                                                                 
                 ACRONYMS   FOR   ELECTRONICS                     


   
                                
 AAAI      AMERICAN ASSOCIATION FOR ARTIFICIAL INTELLIGENCE       
 ABC       AUTOMATIC BRIGHTNESS CONTROL                           
 ABET      ACCREDITATION BOARD FOR,ENGINEERING AND TECHNOLOGY     
 AC        ALTERNATING CURRENT                                    
 ACD       ALARM CONTROL DISPLAY                                  
 ACD       AUTOMATIC CALL DISTRIBUTION                            
 ACES      AMP COOPERATIVE ELECTRONICS SUB-CONTRACTOR             
 ACM       ASSOCIATION FOR COMPUTER MACHINERY                     
 ACMOS     ADVANCED CMOS                                          
 ACT       ACOUSTIC CHARGE TRANSPORT                              
 ADC       ANALOG/DIGITAL CONVERTER                               
 ADCCP     ADVANCED DATA CONTROL PROCEDURES                       
 ADF       AUTOMATIC DIRECTION FINDING                            
 ADI       AUTOMATIC DIRECTION INDICATOR                          
 ADPCM     ADAPTIVE DIFFERENTIAL PULSE-CODE MODULATION            
 AF        AUDIO FREQUENCY                                        
 AFA       ADVANCED FUNCTION ARRAY                                
 AFC       AUTOMATIC FREQUENCY CONTROL                            
 AGC       AUTOMATIC GAIN CONTROL                                 
 AI        ARTIFICIAL INTELLIGENCE                                
 AIM       AUTOMATIC IDENTIFICATION MANUFACTURERS                 
 AIN       ADVANCED INTELLIGENT NETWORK                           
 AIRPAP    AIR PRESSURE ANALYSIS PROGRAM                          
 AIS       ALARM INDICATION SIGNALS                               
 AISP      ASSOC. FOR INFORMATION SYSTEMS PROFESSIONALS           
 AJ        ANTI JAMMING                                           
 ALGOL     ALGORITHMIC LANGUAGE                                   
 ALGOL     PROGRAMMING LANGUAGE                                   
 ALS       ACTION LOGIC SYSTEM                                    
 ALU       ARITHMETIC LOGIC UNIT                                  
 AM/PM     AMPLITUDE AND PHASE MODULATION                         
 AM        AMPLITUDE MODULATION                                   
 AMI       ALTERNATE MARK INVERSION CODES INTERCHANGE             
 AND       AND GATE                                               
 ANSI      AMERICAN NATIONAL STANDARDS UNITS                      
 APA       ALL POINTS ADDRESSABLE CAPABILITY                      
 APEC      APPLIED POWER ELECTRONICS CONFERENCE                   
 APF       APPLICATION PROGRAM FUNCTION                           
 API       APPLICATION PROGRAM INTERFACE                                                                                           
 APL       A PROGRAMMING LANGUAGE                                 
 APM       PULSE POSITION MODULATION                              
 APP       APPLICATION DATE                                       
 APPANET   PACKET NETWORK                                         
 APPN      ADVANCED PEER TO PEER NETWORKING                       
 APSE      APPLICATION PROGRAM SUPPORT ENVIRONMENT                
 APT       ASYMMETRICAL POWER TRANSFER                            
                              -2-
											     


 ARAEN     REFERENCE APPARATUS FOR DETERMING PERFORMANCE DATA     
 ARB       ARBITRARY WAVEFORM GENERATOR                           
 ARMA      AUTO REGRESSIVE MOVING AVERAGE MODEL                   
 ARPA      ADVANCED RESEARCH PROJECTS AGENCY                      
 ARPANET   ADVANCED RESEARCH PROJECTS AGENCY                      
 ARQ       AUTOMATIC REPETITION (AS IN PACKET TRANSMISSION)       
 ASCII     AMERICAN STANDARD CODE FOR INFORMATION INTERCHANGE     
 ASIC      APPLICATION-SPECIFIC INTEGRATED CIRCUIT                
 ASK       AMPLITUDE SHIFT KEYING                                 
 ASPI      ADVANCED SCSI PROGRAMMING INTERFACE                    
 ASR       AUTOMATIC SEND/RECEIVE (AS IN TELETYPE)                
 ASSP      ACOUSTIC SPEECH AND SIGNAL PROCESSING                  
 ASTM      AMERICAN SOCIETY FOR TESTING AND MATERIALS             
 AT&T      AMERICAN TELEPHONE AND TELEGRAPH CO.                   
 ATCRB     AIR TRAFFIC CONTROL RADAR BEACON                       
 ATIC      TIME ASSIGNMENT WITH SAMPLE INTERPOLATION              
 ATM       AUTOMATIC TELLER MACHINE                               
 ATM       ADVANCED TRANSMISSION METHOD                           
 ATPG      AUTOMATIC TEST PROGRAM GENERATION                      
 ATRC      ADVANCED TELEVISION RESEARCH CONSORTIUUM               
 ATV       ADVANCED TELEVISION                                    
 AU        ASTRONOMICAL UNIT                                      
 AUTODI    AUTOMATIC DIGITAL NETWORK                              
 AWG       AMERICAN WIRE GUAGE                                    
 BABT      BRITISH APPROVAL BOARD FOR TELECOMMUNICATIONS          
 BARRITT   BARRIER-INJECTED TRANSIT TIME DIODE                    
 BASIC     BASIC ALL-PURPOSE SYMBOLIC INSTRUCTION CODE            
 BBD       BUCKET BRIGADE DEVICES                                 
 BBS       BULLETIN BOARD SYSTEM                                  
 BCCD      BURIED CHANNEL CHARGE-COUPLED DEVICES                  
 BCD       BINARY CODED DECIMAL CODE                              
 BCH       BOSE-CHAUDHURI-HOCQENGHEM CODES                        
 BEL       UNIT                                                   
 BERT      BUILT-IN ERROR RATE TEST                               
 BFO       BEAT FREQUENCY OSCILLATOR                              
 BFSK      BINARY FREQUENCY SHIFT KEYING                          
 BHCA      BUSY-HOUR CALL ATTEMPTS                                
 BIFET     BI-POLAR FIELD EFFECT TRANSMITTER                      
 BIFET     BINARY FIELD-EFFECT TRANSISTOR                         
 BIOS      BASIC INPUT/OUTPUT SYSTEM                              
 BIT       BUILT-IN TEST OBJECTIVES                               
 BJT       BIPOLAR JUNCTION TRANSISTOR                            
 BLIP      BACKGROUND LIMITED INFRARED PHOTODETECTOR              
 BME       BACKWARD MODE EMULATOR                                 
 BMPM      INPUT BOARD POWER MODULE                               
 BMU       BASIC MEASUREMENT UNIT                                 
 BNZS      BIPOLAR WITH N ZERO SUBSTITUTION CODES                 
 BOOK      BINARY ON-OFF KEYING                                   
 BPSK      BINARY PHASE-SHIFT KEYING                              
 BRI       BASIC RATE INTERFACE                                   
 BSC       BINARY SYMMETRIC CHANNEL                               
 BSR       BUREAU OF STANDARDS REVIEW                             
 BWG       BIRMINGHAM WIRE GUAGE                                  
                              -3-



 BWO       BACKWARD-WAVE OSCILLATOR                               
 C-QUAM    COMPATIBLE QUADRATURE AMPLITUDE MODULATION             
 CAD       COMPUTER AIDED DESIGN                                  
 CAE       COMPUTER AIDED ENGINEERING                             
 CAM       COMPUTER-AIDED MANUFACTURE                             
 CAMAC     COMPUTER-AIDED MEASUREMENT AND CONTROL                 
 CAPD      CONTINUOUS AMBULATORY PERITONEAL DIALYSIS              
 CASE      COMPUTER AIDED SYSTEM EVALUATION                       
 CATE      COMPUTER AIDED TEST ENGINEERING                        
 CATV      COMMUNITY ANTENNA SYSTEM (CABLE TV)                    
 CBEMA     COMPUTER AND BUSINESS MANUFACTURERS ASSOCIATION        
 CCD       CHARGE COUPLED DEVICE                                  
 CCIF      INTERNATIONAL TELEPHONE CONSULTAVE COMMITTEE           
 CCIR      INTERNATIONAL RADIO CONSULTIVE COMMITTEE               
 CCIS      COMMON CHANNEL INTEROFFICE SIGNALLING                  
 CCITT     INTERNATIONAL CONSULTIVE COMMITTEE ON TELEPHONY AND    
 CCP       CENTRAL CONTROL PROCESSOR                              
 CCS       COMMON-CHANNEL SIGNALLING                              
 CCU       CAMERA CONTROL UNIT                                    
 CD-ROM    COMPACT DISK READ-ONLY MEMORY                          
 CD        COMPACT DISK                                           
 CDFFC     CONTOLLABLE-DISPLACEMENT-FACTOR FREQUENCY CHANGERS     
 CDI       COMPUTER DIRECT INPUT                                  
 CDMA      CODE DIVISION MULTIPLE ACCESS TECHNOLOGY               
 CDRAM     CACHE DYNAMIC RANDOM-ACCESS-MEMORY                     
 CEO       CHIEF EXECUTIVE OFFICER                                
 CEPT      CONFERENCE OF EUROPEAN POSTAL AND TELECOMMUNICATION    
 CFA       CROSSED FIELD AMPLIFIER                                
 CFA       RE-ENTRANT-STREAM CROSSED-FIELD AMPLIFIER              
 CFAR      CONSTANT FALSE-ALARM RATES                             
 CFI       CAD FRAMEWORK INITIATIVE                               
 CFTA      US CANADA FREE TRADE AGREEMENT                         
 CGPM      GENERAL CONFERENCE ON WEIGHTS AND MEASURES             
 CHDB      COMPATIBLE HIGH-DENSITY POLAR                          
 CHDL      COMPUTER HARDWARE DESCRIPTION LANGUAGE                 
 CID       CHARGE-INJECTION DEVICE                                
 CID       CHARGE-INTERACTION DEVICE                              
 CIE       COMITE' INTERNATIONAL DE ECLAIRAGE                     
 CIM/ATT   CONCURRENT INFORMATION MANAGEMENT ACTION ITEM TRACKING 
 CIRC      CROSS-INTERLEAVE REED-SOLOMON CODE                     
 CLNS      CORRECTIONLESS NETWORK SERVICE                         
 CM        COMMON-MODE INPUTS                                     
 CMOS      COMPLIMENTARY METAL-OXIDE-SEMICONDUCTOR LOGIC          
 CNC       COMPUTER NUMERICAL CODE                                
 CO        CENTRAL OFFICE                                         
 COAX      COAXIAL CABLE                                          
 COBOL     PROGRAMMING LANGUAGE                                   
 COBOL     COMMON BUSINESS ORIENTED LANGUAGE                      
 COCOM     COORDINATING CONFERENCE FOR MILITARY EXPORT CONTROLS   
                              -4-



 CONS      CONNECTION ORIENTED SERVICE                            
 CPE       CENTRAL PROGRAMMER AND EVALUATOR                       
 CPI       CHARACTERS PER INCH                                    
 CPS       CHARACTERS PER SECOND                                  
 CPS       CYCLES PER SECOND                                      
 CPSC      CONSUMER PRODUCTS SAFETY COMMISSION                    
 CPU       CENTRAL PROCESSING UNIT                                
 CSA       CANADIAN STANDARDS ASSOCIATION                         
 CTD       CHARGE-TRANSFER DEVICE                                 
 CUT       CONTROL UNIT TERMINAL                                  
 CVD       CHEMICAL VAPOR DEPOSITION                              
 CW        CONTINUOUS WAVE (I.E. MORSE CODE)                      
 D/A       DIGITAL-TO-ANALOG                                      
 DAA       DATA ACCESS ARRANGEMENT                                
 DAC       DATA ACQUISITION CONTROL                               
 DAC       DIGITAL/ANALOG CONVERTER                               
 DACS      DIGITAL ACCESS AND CROSS-CONNECT SYSTEM                
 DASO      DIRECT ACCESS STORAGE DEVICE                           
 DASP      DIGITAL ARRAY SIGNAL PROCESSOR                         
 DB        DECIBEL                                                
 DBD       DEUTSCHE BUNDESPOT TELEKOM                             
 DBMS      DATA BASE MANAGEMENT SYSTEM                            
 DBS       DIRECT BROADCAST BY SATELLITE                          
 DCE       DATA CIRCUIT TERMINATING EQUIPMENT                     
 DCS       DISTRIBUTED CONTROL SYSTEM                             
 DDC       DIRECT DIGITAL CONTROL                                 
 DDC       DATA DUTY CYCLE                                        
 DDE       DYNAMID DATA EXCHANGE                                  
 DDL       DATA DEFINITION LANGUAGE                               
 DDS       DISTRIBUTED DATA MANAGEMENT                            
 DEA       DRUG ENFORCEMENT AGENCY                                
 DEC       DIGITAL EQUIPMENT COMPANY                              
 DEMUX     DEMULTIPLEXER                                          
 DES       DATA ENCRYPTION STANDARD                               
 DESC      DATA ENTRY SYSTEM CONTROLLER                           
 DEU       DATA ENCRYPTION UNIT                                   
 DEVICE    DEVICE INPUT FORMAT                                    
 DF        DIRECTION FINDING                                      
 DF        DISSIPATION FACTOR                                     
 DFB       DISTRIBUTED FEEDBACK REFLECTOR                         
 DFB       DISTRIBUTED FEEDBACK LASER                             
 DIA       DOCUMENT INTERCHANGE ARCHITECTURE                      
 DIAC      BILATERAL SHOCKLEY DIODE                               
 DIN       DIGITAL INPUT                                          
 DIP       DUAL IN-LINE PACKAGE                                   
 DLC       DIGITAL LOGIC CIRCUIT                                  
 DLL       DYNAMIC LINK LIBRARY                                   
 DM        DIFFERENTIAL MODE                                      
 DM        DELTA MODULATION                                       
                              -5-



 DMA       DIRECT MEMORY ACCESS CONTROL                           
 DME       DISTANCE MEASURING EQUIPMENT                           
 DMM       DIGITAL MULTI METER                                    
 DMOS      DOUBLE DIFFUSED METAL OXIDE SEMICONDUCTOR              
 DOA       EQUIPMENT DEAD-ON-ARRIVAL                              
 DOF       DEVICE OPERATING FAILURES                              
 DORC      DEVELOPERS OPEN-RESOURCE SOFTWARE                      
 DOS       DIGITAL OPERATING SYSTEM                               
 DOVETT    DOUBLE VELOCITY TRANSIT TIME DIODE                     
 DP        ELECTRONIC DATA PROCESSING                             
 DPCM      DIFFERENTIAL PULSE CODE MODULATION                     
 DPDT      DOUBLE POLE DOUBLE THROW (SWITCH)                      
 DPSK      DIFFERENTIAL PHASE SHIFT KEYING                        
 DRAM      DYNAMIC RANDOM ACCESS MEMORY                           
 DRO       DIALECTRIC RESONATOR OSCILLATOR                        
 DRO       DIGITAL READOUT                                        
 DS        DIRECT SEQUENCE WAVEFORM                               
 DSBAM     DOUBLE SIDEBAND AMPLITUDE MODULATION                   
 DSP       DIGITAL SIGNAL PROCESSING                              
 DTDN      DIGITAL TIME-DIVISION NETWORK                          
 DTE       DATA TERMINAL EQUIPMENT                                
 DTL       DIGITAL TRANSISTOR LOGIC                               
 DTMF      DUAL-TONE MULTIFREQUENCY SIGNAL                        
 DVI       DIGITAL VIDEO INTERACTIVE MODE                         
 DVM       DIGITAL VOLTMETER                                      
 DVST      DIRECT VIEW STORAGE TUBE                               
 EAROM     ELECTRICALLY ALTERABLE READ-ONLY MEMORY                
 EBCDIC    EXTENDED BINARY CODED DECIMAL INTERCHANGE CODE         
 EBIC      ELECTRON-BOMBARDMENT-INDUCED-CONDUCTION                
 ECG       ELECTROCARDIOGRAM                                      
 ECL       EMITTER COUPLED LOGIC                                  
 ECSA      EXCHANGE CARRIERS STANDARS ASSOCIATION                 
 EDA       ELECTRONIC DEWSIGN AUTOMATION                          
 EDC       ENABLE DUTY CYCLE                                      
 EDP       ELECTRONIC DATA PROCESSING                             
 EEG       ELECTROENCEPHALOGRAM                                   
 EEPROM    ELECTRICALLY ERASABLE PROGRAMMING READ-ONLY MEMORY     
 EESM      EMPLOYEE EVALUATOR AND SALARY MANAGER                  
 EFM       EIGHT-TO-FOURTEEN MODULATION                           
 EGA       ENHANCED GRAPHICS ADAPTER                              
 EHF       EXTREMELY HIGH-FREQUENCY BAND                          
 EIA       ELECTRONIC INDUSTRIES ASSOCIATION                      
 EIRP      EQUIVALENT ISOTROPICALLY RADIATED POWER                
 EISA      EXTENDED INDUSTRY STANDARD ARCHITECTURE                
 EL        ELECROLUMINESCENT DISPLAY                              
 ELF       EXTREMELY LOW FREQUENCY                                
 EM        ELECTROMAGNETIC DEFLACTION                             
 EM        EXPANDED MEMORY                                        
 EMC       ELECTRONIC SIGNAL PROCESSOR                            
                              -6-



 EMC       ELECTRO-MAGNETIC CPMPATIBILITY                         
 EMG       ELECTROMYOGRAM                                         
 EMI       ELECTROMAGNETIC INTERFERENCE                           
 EMM       EXPANDED MEMORY MANAGER                                
 EMR       ELECTROMAGNETIC RELAY                                  
 EMRP      EFFECTIVE MONOPOLE RADIATED POWER                      
 EOB       END OF BLOCK                                           
 EOF       END OF FIELD                                           
 EPA       ENVIRONMENTAL PROTECTION AGENCY                        
 EPC       EMBEDDED PC                                            
 EPL       EQUIVALENT PEAK LEVEL                                  
 EPLD      ELECTRICALLY PROGRAMMABLE LOGIC DEVICE                 
 EPROM     ELECTRICALLY PROGRAMMABLE READ-ONLY MEMORY             
 EPROM     ERASABLE PROGRAMMABLE READ-ONLY MEMORY                 
 EROM      ERASABLE READ-ONLY MEMORY                              
 ERP       EFFECTIVE RADIATED POWER                               
 ERS       EFFECTIVE RECEIVER SENSITIVITY                         
 ES        ELECTROSTATIC DEFLECTION                               
 ESDI      ENHANCED SMALL DEVICE INDICATOR                        
 ESR       EQUIVALENT SERIES RESISTANCE                           
 EXM       EXTENDED MEMORY PARAMETER                              
 F-TD      FREQUENCY-TIME DODGING WAVEFORMS                       
 F/V       FREQUENCY TO VOLTAGE CONVERTERS                        
 FAMOS     FLOATING-GATE AVALANCHE INJECTION MOS TRANSISTORS      
 FAST      FAIRCHILD SCHLOTTKY TTL                                
 FAT       FILE-ALLOCATION TABLE                                  
 FAX       FACSIMILE SYSTEM                                       
 FCC       FEDERAL COMMUNICATIONS COMMISSION                      
 FDA       FOOD AND DRUG ADMINISTRATION                           
 FDAP      FREQUENCY DOMAIN ARRAY PROCESSOR                       
 FDDI      FIBRE DISTRIBUTED DATA INTERFACE                       
 FDM       FREQUENCY-DIVISION MULTIPLEXING                        
 FDMA      FREQUENCY-DIVISION MULTIPLE ACCESS                     
 FDNR      FREQUENCY-DEPENDENT NEGATIVE RESISTOR                  
 FDNR      FREQUENCY DEPENDENT NEGATIVE RESISTANCE                
 FEC       FORWARD ERROR CORRECTING                               
 FEP       FRONT-END PROCESSOR                                    
 FET       FIELD EFFECT TRANSISTOR                                
 FIFO      FIRST IN FIRST OUT                                     
 FIP       FIELD INSPECTION PROCEDURE                             
 FIPS      FEDERAL INFORMATION PROCESSING STANDARD                
 FIR       FINITE IMPULSE RESPONSE                                
 FIT       FAILURES PER INTERVAL OF TIME                          
 FM        FREQUENCY MODULATION                                   
 FMEA      FAILURE MODE AND EFFECTS ANALYSIS                      
 FMFB      FREQUENCY MODULATION FEEDBACK                          
 FOM       FIGURE OF MERIT                                        
 FON       UNITED TELECOM (SPRINT) STOCK SYMBOL                   
 FORTH     PROGRAMMING LANGUAGE                                   
                              -7-



 FORTRAN   PROGRAMMING LANGUAGE                                   
 FOT       OPTIMUM WORKING FREQUENCY                              
 FPGA      FLEXIBLE PROGRAMMING GATE ARRAYS                       
 FPGA      FIELD PROGRAMMABLE GATE ARRAY                          
 FPU       FLOATING-POINT PROCESSING UNIT                         
 FSK       FREQUENCY SHIFT KEYING                                 
 FTA       FAULT-TREE ANALYSIS                                    
 FTC       FEDERAL TRADE COMMISSION                               
 GAA       GALIUM ARSENIDE                                        
 GAL       GALIUM ARSENIDE LASER                                  
 GAO       GOVERNMENT ACCOUNTING OFFICE                           
 GCA       GROUND CONTROL APPROACH SYSTEM                         
 GCS       GATE-CONTROLLED SWITCH                                 
 GDF       GRAPHICAL DISPLAY FILE                                 
 GDI       GRAYLINE DEVICE INTERFACE                              
 GEG       GOVERNMENT ELECTRONICS GROUP                           
 GeV       GIGAELECTRONVOLT                                       
 GIC       GENERALIZED IMPEDANCE CONVERTER                        
 GIF       GRAPHICAL INFORMATION SYSTEM                           
 GIN       GRAPHIC INPUT                                          
 GKS       GRAPHICS KERNEL SYSTEM                                 
 GM        GIFFORD-MCMAHON CYCLE OF REFRIGERATORS                 
 GNP       GROSS NATIONAL PRODUCT                                 
 GP        GEOMETRIC PROGRAMMING                                  
 GPIB      GENERAL PURPOSE INTERFACE BUS                          
 GPS       GLOBAL POSITIONING SYSTEM                              
 GPSS      GENERAL PURPOSE SIMULATION SYSTEM                      
 GPWS      GROUND PROXIMITY WARNING SYSTEM                        
 GR        GENERATION-RECOMBINATION NOISE                         
 GTD       GEOMETRICAL THEORY OF DIFFRACTION                      
 GTO       GATE TURN-OFF SWITCH                                   
 GUI       GRAPHIC USER INTERFACE                                 
 H-D       HURTER-DRIFFIELD CURVE                                 
 HCC       HERMETIC CHIP CARRIER                                  
 HCI       HUMAN-COMPUTER INTERFACE                               
 HDB       HIGH DENSITY POLAR CODE                                
 HDL       HARDWARE DESCRIPTION LANGUAGE                          
 HDLC      HIGH-LEVEL DATA-LIN-CONTROL PROTOCOL                   
 HDSL      HIGH-BIT-RATE DIGITAL SUBSCRIBER LINE                  
 HDTV      HIGH DEFINITION TELEVISION                             
 HEMT      HIGH ELECTRON MOBILITY TRANSISTOR                      
 HEX       HEXIDECIMAL                                            
 HF        HIGH FREQUENCY BAND                                    
 HGC       HERCULES GRAPHICS CARD                                 
 HIC       HYBRID INTEGRATED CIRCUIT                              
 HIDM      HIGH-INFORMATION DELTA MODULATION                      
 HIPO      HIERARCHY PLUS INPUT-PROCESSING-OUTPUT                 
 HIPPI     HIGH PERFORMANCE PARALLEL INTERFACE                    
 HLL       HIGH-LEVEL LANGUAGE DEBUGGER                           
                              -8-



 HPA       HIGH POWER AMPLIFIER                                   
 HR        HUMAN RESOURCES                                        
 HSPICE    ANALOG SIMULATOR                                       
 HTL       HIGH-THRESHOLD LOGIC                                   
 I/O       INPUT/OUTPUT EQUIPMENT                                 
 I/O       INPUT/OUTPUT DEVICE                                    
 I2L       INTEGRATED INJECTION LOGIC                             
 IABP      INTRAAORTIC BALLOON PUMP                               
 IABP      INTERAORTIC BALLOON PUMP                               
 IACS      INTERNATIONAL ANNEALED COPPER STANDARD                 
 IBM       INTERNATIONAL BUSINESS MACHINES                        
 IC        INTEGRATED CIRCUIT                                     
 IC        INTEGER COLUMN POINTER ARRAY                           
 ICAM      INTEGRATED COMPUTER AIDED MANUFACTURING                
 ICE       IN-CIRCUIT EMULATION                                   
 ICG       INTERACTIVE COMPUTER GRAPHICS                          
 ICMP      INTERNET CONTROL MESSAGE PROTOCOL                      
 ICPM      INCIDENTAL CARRIER PHASE MODULATION                    
 ICS       IBM CABLING SYSTEM                                     
 ICX       INTEREXCHANGFE CARRIER                                 
 IDE       INTEGRATED DEVELOPMENT ENVIRONMENT                     
 IEC       INTERNATIONAL ELECTROTECHNICAL COMMISSION              
 IEEE      INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS      
 IETF      INTERNET ENGINEERING TASK FORCE                        
 IF        INTERMEDIATE FREQUENCY (AS IN AMPLIFIERS)              
 IFF       IDENTIFICATION FRIEND OR FOE                           
 IGES      INTERNATIONAL GRAPHIC EXCHANGE STANDARD                
 IGFET     INSULATED-GATE FIELD EFFECT TRANSISTOR                 
 IIR       INFINITE RESPONSE                                      
 ILS       INSTRUMENT LANDING SYSTEM                              
 IMP       INTERFACE MESSAGE PROCESSOR                            
 IMP       INTERFACE MESSAGE PROCESSOR                            
 IMPATT    IMPACT AVALANCHE TRANSIT-TIME DIODE                    
 IMS       INFORMATION MANAGEMENT SYSTEM                          
 IOCS      INPUT/OUTPUT CONTROL SYSTEM                            
 IP        INTEGER PROGRAM                                        
 IPC       INTERPROCESS CONTROLLER                                
 IPC       INFORMATION PROCESSING CODE                            
 IPL       INITIAL PROGRAM LOAD                                   
 IPL       INITIAL PROGRAM LOAD                                   
 IPPS      INTEGRATED PACKET SWITCHING SERVICE                    
 IR        INFRARED SPECTRUM                                      
 IR        INFRARED-SENSITIVE GLASSES                             
 IR        INFRARED DETECTOR                                      
 IR        INFRARED IMAGE CONVERTERS                              
 IRG       INTERRECORD GAPS                                       
 ISA       INDUSTRY STANDARD ASSOCIATION                          
 ISAM      INDEXED SEQUENTIAL-ACCESS METHOD                       
 ISAM      INDEXED SEQUENTIAL ACCESS METHOD                       
                              -9-



 ISB       INDEPENDENT SIDEBAND MODULATION                        
 ISDN      INTEGRATED SERVICE DIGITAL NETWORK                     
 ISFET     ION-SENSITIVE FIELD-EFFECT TRANSISTOR                  
 ISL       INTEGRATED SCHOTTKY LOGIC                              
 ISO       INTERNATIONAL STANDARDS ORGANIZATION                   
 ISU       INTERNATIONAL SYSTEM OF UNITS                          
 IT        INFORMATION TECHNOLOGY                                 
 ITT       INTERNATIONAL TELEPHONE AND TELEGRAPH                  
 ITU       INTERNATINAL TELECOMMUNICATIONS UNION                  
 IVD       INSIDE VAPOR DEPOSITION                                
 IVDT      INTEGRATED VOICE DATA TERMINAL                         
 IWU       INTERNETWORK UNIT                                      
 JCL       JOB CONTROL LANGUAGE                                   
 JEDE      JOINT ELECTRON-DEVICE ENGINEERING                      
 JFET      JUNCTION FIELD EFFECT TRANSISTOR                       
 JK        FLIP-FLOPS                                             
 JPEG      JOINT PHOTOGRAPHIC EXPERTS GROUP                       
 JTIDS     JOINT TACTICAL INFORMATION DITRIBUTION SYSTEM          
 KB        KILOBYTE                                               
 KCL       KIRCHHOFF'S CURRENT LAW                                
 KISS      KEEP IT SIMPLE STUPID                                  
 KLIPS     ONE K LOGICAL INFERENCES PER SECOND                    
 KVL       KIRCHHOFF'S VOLTAGE LAW                                
 KW        KILOWATT                                               
 LADT      LOCAL AREA DATA TRANSPORT                              
 LAN       LOCAL AREA NETWORK                                     
 LAN/WAN   LOCAL AREA NETWORK/WIDE AREA NETWORK                   
 LATA      LOCAL ACCESS AND TRANSPORT AREAS                       
 LC        TYPE OF OSCILLATOR                                     
 LCD       LIQUID CRYSTAL DISPLAY                                 
 LE        LUMINOUS EFFICIENCY                                    
 LEAF      LOTUS EXTENDED APPLICATIONS FACILITY                   
 LEC       LOCAL EXCHANGE CARRIER                                 
 LED       LIGHT EMITTING DIODE                                   
 LF        LOW FREQUENCY BAND                                     
 LIFO      LAST-IN FIRST-OUT                                      
 LIM       LOTUS/INTEL/MICROSOFT EXPANDED MEMORY SPECIFICATION    
 LINC      LOCAL INTELLIGENT NETWORK CONTROLLER                   
 LIPS      LOGICAL INFERENCES PER SECOND                          
 LISP      PROGRAMMING LANGUAGE                                   
 LISP      LIST PROCESSOR                                         
 LLC       LOGICAL LIST CONTROL                                   
 LNA       LOW-NOISE AMPLIFIER                                    
 LO        LOCAL OSCILLATOR                                       
 LOC       LARGE-OPTICAL-CAVITY LASERS                            
 LOF       LOWEST OBSERVED FREQUENCY                              
 LP        LOG PERIODIC ANTENNA                                   
 LP        LINEAL PROGRAMMING                                     
 LPI       LINES PER INCH                                         
                              -10-



 LPM       LINES PER MINUTE                                       
 LSA       LIMITED-SPACE-CHARGE ACCUMULATION DIODE                
 LSB       LOWER SIDEBAND                                         
 LSCVD     LIQUID-SOURCE CHEMICAL VAPOR DEPOSITION                
 LSI       LARGE SCALE INTEGRATION                                
 LU        DECOMPOSITION                                          
 LVAD      LEFT VENTRICULAR ASSIST DEVICE                         
 MA        MAGNETIC AMPLIFIER                                     
 MAC       MULIPLY/ACCUMULATE                                     
 MAC       MULTIPLEXED ANALOG COMPONENTS                          
 MAN       METROPOLITAN AREA NETWORK                              
 MB        MEGABYTE                                               
 MBPS      MEGABYTES PER SECOND                                   
 MBWO      M-BACKWARD-WAVE OSCILLATOR                             
 MCI       MEDIA CONTROL INTERFACE                                
 MCM       MULTILAYER CERAMIC MULTICHIP                           
 MCM       MEMORY CONTROL MODULE                                  
 MCP       MICROCHANNEL PLATE ARRAY                               
 MCPC      MULTIPLE CHANNEL PER CARRIER                           
 MCU       MACHINE CONTROL UNIT                                   
 MDA       MONOCHROME DISPLAY ADAPTER                             
 MDI       MANUAL DATA INPUT                                      
 MF        MEDIUM FREQUENCY BAND                                  
 MFLOP     MILLION FLOATING-POINT OPERATIONS PER SECOND           
 MFM       MODIFIED FREQUENCY-MODULATION CODE                     
 MFM       MODIFIED FREQUENCY MODULATION                          
 MHZ       MEGAHERTZ                                              
 MIB       MANAGEMENT INFORMATION BASE                            
 MIC       MICROWAVE INTEGRATED CIRCUITS                          
 MIMD      MULTIPLE-INSTRUCTION-STREAM-MUTIPLE-DATA-STREAM        
 MIPS      MILLIONS OF INSTRUCTIONS PER SECOND                    
 MIS       MANAGEMENT OF INFORMATION SERVICES                     
 MISFET    METAL-INSULATOR-SEMICONDUCTOR FIELD-EFFECT TRANSIST    
 MLS       MICROWAVE LANDING SYSTEM                               
 MMG       MULTIBUS MANUFACTURERS GROUP                           
 MMIC      MONOLITHIC MICROWAVE INTEGRATED CIRCUIT                
 MMIC      MONOLITHIC MICROWAVE INTEGRATED CIRCUITS               
 MMU       MEMORY MANAGEMENT UNIT                                 
 MNA       MODIFIED NODAL APPROACH                                
 MO        MAGNETIC OPTICAL DRIVE                                 
 MOF       MAXIMUM OBSERVED FREQUENCY                             
 MOPS      MILLION OPERATIONS PER SECOND                          
 MOS       METAL OXIDE SURFACE                                    
 MOSFET    METAL-OXIDE-SEMICNDUCTOR FIELD EFFECT TRANSISTOR       
 MOTIVE    MODULAR TIMING VERIFIER                                
 MPA       MONOCHROME DISPLAY ADAPTER                             
 MPC       MULTIMEDIA PERSONAL COMPUTER                           
 MPEG      MOTION PICTURE EXPERTS GROUP                           
 MS        MICROSOFT                                              
                              -11-



 MSAT      MOBILE SATELLITE TERMINAL                              
 MSS       MASSIVE STORAGE SYSTEM                                 
 MTBF      MEAN TIME BETWEEN FAILURES                             
 MTF       MODULATION TRANSFER FUNCTION                           
 MTI       MOVING-TARGET-INDICATOR                                
 MTS       MOBILE TELEPHONE SYSTEM                                
 MTTF      MEAN TIME TO FAILURE                                   
 MUF       MAXIMUM USABLE FREQUENCY                               
 MUMPS     PROGRAMMING LANGUAGE                                   
 MUSA      MULTIPLE UNIT STEERABLE ARRAY ANTENNA                  
 MUSE      MULTIPLE SUBNYQUIST SAMPLING ENCODING                  
 MUX       MULTIPLEXER                                            
 MVS       MULTIPLE VIRTUAL STORAGE                               
 MWB       MULTI-WIRE BOARD                                       
 NAB       NATIONAL ASSOCIATION OF BROADCASTERS                   
 NAFTA     NORTH AMERICA FREE TRADE AGREEMENT                     
 NAND      GATE                                                   
 NANPA     NORTH AMERICAN NUMBERING PLAN ADMINISTRATION           
 NATO      NORTH ATLANTIC TREATY ORGANIZATION                     
 NBS       NATIONAL BUREAU OF STANDARDS                           
 NC        NORMALLY CLOSED                                        
 NC        NOISE CRITERION CURVES                                 
 NC        NUMERICAL CONTROL                                      
 NCC       NATURALLY COMMUTATED CYCLOCONVERTERS                   
 NCI       NON-CODED INFORMATION CAPABILITY                       
 NCS       NETWORK CONTROL SYSTEM                                 
 NDB       NON-DIRECTIONAL BEACON                                 
 NDP       NUMERIC DATA PROCESSING                                
 NDRO      NON-DESTRUCTIVE READ-ONLY                              
 NEC       NIPPON ELECTRIC COMPANY                                
 NEMA      NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION          
 NEP       NOISE EQUIVALENT POWER                                 
 NETBIOS   NETWORK BASIC INPUT/OUTPUT SYSTEM                      
 NFPA      NATIONAL FIRE PROTECTION ASSOCIATION                   
 NGDLC     NEXT GENERATION DIGITAL LOOP CARRIER                   
 NICE      NORMAL INPUT/OUTPUT CONTROL ENVIRONMENT                
 NIST      NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY         
 NIU       NORTH AMERICAN ISDN USERS                              
 NIU       NETWORK INTERFACE UNIT                                 
 NLP       NON-LINEAR PROGRAMMING                                 
 NLP       NON-LINEAR PROGRAM                                     
 NME       NOISE MEASURING EQUIPMENT                              
 NMOS      N-TYPE METAL OXIDE SEMICONDUCTOR                       
 NO        NORMALLY OPEN                                          
 NPN       TYPE OF TRANSISTOR                                     
 NRC       NOISE-REDUCTION COEFFICIENT                            
 NRC       NUCLEAR REGULATORY COMMISSION                          
 NRE       NEGATIVE RESISTANCE EFFECT                             
 NRZ       NON-RETURN TO ZERO CODE                                
                              -12-



 NRZI      NON-RETURN TO ZERO INVERTED CODE                       
 NSA       NATIONAL SECURITY AGENCY                               
 NTIA      NATIONAL TELECOMMUNICATIONS AND INFORMATION CRITERIA   
 NTT       NIPPON TELEGRAPH AND TELEPHONE                         
 NVRAM     NON-VOLATILE RANDOM-ACCESS-MEMORY                      
 O-ROM     OPTICAL READ-ONLY MEMORY                               
 OAI       OPEN APPLICATIONS INTERFACE                            
 OAM       OPERATION, ADMINISTRATION, AND MAINTENANCE             
 OCR       OPTICAL CHARACTER RECOGNITION                          
 OCXO      OVEN-CONTROLLED CRYSTAL OSCILLATOR                     
 OEM       ORIGINAL EQUIPMENT MANUFACTURER                        
 ONE       OPTIMIZED NETWORK EVOLUTION                            
 OOK       ON-OFF KEYING                                          
 OOP       OBJECT-ORIENTED PROGRAMMING                            
 OP-AMP    OPERATIONAL AMPLIFIER                                  
 OR        OR GATE                                                
 OR/NOR    GATES                                                  
 OS/2      OPERATING SYSTEM                                       
 OS        OPERATING SYSTEM                                       
 OSF       OPEN SOFTWARE FOUNDATION                               
 OSHA      OCCUPATION AND HEALTH ADMINISTRATION                   
 OSI       OPEN SYSTEMS INTERCONNECTION                           
 OSPF      OPEN SHORTEST PATH FIRST                               
 OSS       OPERATIONS SUPPORT SYSTEM                              
 OTA       OFFICE OF TECHNOLOGY ASSESSMENT                        
 OTP       ONE-TIME PROGRAMMABLE                                  
 OVD       OUTSIDE VAPOR DEPOSITION                               
 OWF       OPTIMUM WORKING FREQUENCY                              
 PAC       PRIMARY ADDRESS CODE                                   
 PACS      PLANT AUTOMATION COMMUNICATIONS SYSTEM                 
 PAL       PHASE ALTERNATION LINE SYSTEM                          
 PAL       PROGRAMMABLE ARRAY LOGIC                               
 PAM       PRECISION APPROACH RADAR                               
 PBX       PRIVATE BRANCH EXCHANGE                                
 PC        PERSONAL COMPUTER                                      
 PC-MOS    OPERATING SYSTEM                                       
 PCB       PRINTED CIRCUIT BOARD                                  
 PCD       PROCESS CONTROL DEVICE                                 
 PCLP      PERSONAL COMPUTER LAN PROGRAM                          
 PCM       PULSE CODE MODULATION                                  
 PCMCIA    PC MEMORY CARD INTERFACE ASSOCIATION                   
 PCS       PERSONAL COMPUTER SYSTEM                               
 PDL       PROGRAMMING DESIGN LANGUAGE                            
 PDM       PULSE DURATION MODULATION                              
 PDQ       PRE-ROUTE DELAY QUANTIFIER                             
 PDS       PROGRAM DEVELOPMENT SYSTEM                             
 PE        PHASE ENCODING                                         
 PEL       PICTURE ELEMENT                                        
 PEM       PREDICTION ERROR MODULES                               
                              -13-



 PES       PERSONAL EARTH STATION                                 
 PF        POWER FACTOR                                           
 PFKEY     PROGRAM FUNCTION KEY                                   
 PFM       PULSE FREQUENCY MODULATION                             
 PFN       PULSE FORMING NETWORK                                  
 PGA       PROFESSIONAL GRAPHICS ADAPTER                          
 PGF       PRESENTATION GRAPHICS FEATURE                          
 PIC       PROGRAMMABLE INTERRUPT CONTROLLER                      
 PICK      OPERATING SYSTEM                                       
 PICS      PRODUCTION INVENTORY CONTROL SYSTEM                    
 PID       PROPORTIONAL PLUS INTEGRAL PLUS DERIVATIVE LOOPS       
 PIF       PROGRAM INFORMATION FILES                              
 PILOT     PROGRAMMING LANGUAGE                                   
 PIO       PROGRAMMED INPUT/OUTPUT                                
 PIP       PICTURE-IN-PICTURE SYSTEM                              
 PIXEL     PICTURE ELEMENT                                        
 PLA       PROGRAMMABLE LOGIC ARRAY                               
 PLC       PROGRAMMABLE LOGIC CONTROLS                            
 PLCC      PLASTIC LEADLESS CHIP CARRIER                          
 PLD       PROGRAMMABLE LOGIC DEVICE                              
 PLD       PROGRAMMED LOGIC DEVICE                                
 PLL       PHASE LOCKED LOOP                                      
 PMOS      P-TYPE METAL OXIDE SEMICONDUCTOR                       
 PNP       TYPE OF TRANSISTOR                                     
 POD       PROCESSOR SOCKET                                       
 PPL       PROGRAM PRODUCTION LIBRARY                             
 PRI       PRIMARY RATE INTERFACE                                 
 PRO       PROGRAMMABLE REMOTE OPERATION                          
 PROLOG    PROGRAMMING LANGUAGE                                   
 PROM      PROGRAMMABLE READ-ONLY MEMORY                          
 PSL       PROGRAM SUPPORT LIBRARY                                
 PSL/PSA   PROBLEM STATEMENT LANGUAGE/PROBLEM STATEMENT ANALYZER  
 PSL       PORTABLE STANDARD LISP                                 
 PSN       PACKET SWITCHING NODE                                  
 PSPIC     ANALOG SIMULATOR                                       
 PSTN      PUBLIC SWITCHED TELEPHONE NETWORK                      
 PSW       PROGRAM STATUS WORD                                    
 PTM       PULSE TIME MODULATION                                  
 PTO       PUBLIC TELECOMMUNICATONS ORGANIZATION                  
 PTT       POSTAL TELEPHONE AND TELEGRAPH                         
 PWM       PULSE WIDTH MODULATION                                 
 PZT       LEAD ZIRCONIUM TITANATE                                
 Q         QUALITY FACTOR                                         
 QAM       QUADRATURE PHASE SHIFT KEYING                          
 QBE       QUERY-BY-EXAMPLE LANGUAGE                              
 QFP       QUAD FLAT PACK                                         
 QNN       QUANTUM NEURAL NETWORK                                 
 QP        QUADRATURE PROGRAMMING                                 
 QPSK      QUARTENARY PHASE SHIFT KEYING                          
                              -14-



 QZCC      QUADRATURE ZERO-CROSSING COUNTER                       
 R/W       READ/WRITE MEMORY                                      
 R/W       READ/WRITE                                             
 R&D       RESEARCH AND DEVELOPMENT                               
 RA        RECEIVER ATTEMUATION                                   
 RA        RELIABILITY APPORTIONMENT                              
 RAB       REFLECTED SHADOW BOUNDARY                              
 RAID      DISK-DRIVE                                             
 RAM       RANDOM ACCESS MEMORY                                   
 RAMDAC    RANDOM-ACCESS-MEMORY DATA ACQUISITION CONTROL          
 RAP       RELIABLE ACOUSTIC PATH                                 
 RASTI     RAPID SPEECH TRANSMISSION INDEX                        
 RBDT      REVERSE BREAKDOWN THYRISTOR                            
 RCL       RISK CURRENT LIMIT                                     
 READ      RELATIVE ELEMENT ADDRESS DESIGNATE CODE                
 RFC       REQUEST FOR COMMENTS                                   
 RFP       REQUEST FOR PROPOSAL                                   
 RHI       RANGE HEIGHT INDICATOR                                 
 RISC      REDUCED INSTRUCTION SET COMPUTER                       
 RLC       REMOTE LINE CONCENTRATOR                               
 RMON MIB  REMOTE MONITORING INFORMATION BASE                     
 RMON      REMOTE MONITORING OF NETWORKS                          
 RO        READ ONLY                                              
 ROC       RECEIVER OPERATING CHARACTERISTICS CURVES              
 ROM-BIOS  READ ONLY MEMORY-BASIC INPUT/OUTPUT SYSTEM             
 ROM       READ-ONLY MEMORY                                       
 RPM       REVOLUTIONS PER MINUTE                                 
 RRS       REMOTE SWITCHING UNIT                                  
 RSS       REQUIRED RESPONSE SPECTRA                              
 RT        RISC TECHNOLOGY                                        
 RTD       RESISTANCE THERMAL DETECTOR                            
 RTE       REAL-TIME EXTENSION                                    
 RTIC      REAL TIME INTERFACE CONNECTOR                          
 RTL       RESISTOR-TRANSISTOR LOGIC                              
 RTMX      REAL-TIME MULTIPLATFORM UNIX                           
 RTOS      REAL TIME OPERATING SYSTEM                             
 SA        SINOATRIAL NODES                                       
 SAC       SMART ACCESS CONTROLLER                                
 SADT      STRUCTURED ANALYSIS AND DESIGN TECHNIQUE               
 SAM       SERIAL-ACCESS-MEMORY ARRAY                             
 SAM       SURFACE-AIR MISSILE                                    
 SAMA      SCIENTIFIC APPARATUS MANUFACTURERS ASSOCIATION         
 SAP       SERVICE ACCESS POINTS                                  
 SAS       SWITCHED ACCESS SYSTEM                                 
 SAW       SURFACE ACOUSTIC WAVE                                  
 SBC       SINGLE BOARD COMPUTER                                  
 SCA       SUBSIDIARY FM COMMUNICATONS AUTHORIZATIONS             
 SCCD      SURFACE-CHANNEL CHARGE-COUPLED DEVICE                  
 SCH       SEPARATE-CONFINEMENT HETEROJUNCION LASER               
                              -15-



 SCPC      SINGLE CHANNEL PER CARRIER                             
 SCPI      STANDARD COMMANDS FOR PROGRAMMING                      
 SCR       SILICON CONTROLLED RECTIFIER                           
 SCRIPT    FORMATTER COMPONENT OF OCF                             
 SCS       SILICON CONTROLLED SWITCH                              
 SCSI      SMALL COMPUTER SYSTEM INTERFACE                        
 SCSI      SMALL COMPUTER SYSTEMS INTERFACE                       
 SDH       SYNCHRONOUS DIGITAL HIERARCHY                          
 SDLC      SYNCHRONOUS-DATA-LINK-CONTROL PROTOCOL                 
 SDN       SOFTWARE DEFINED NETWORK                               
 SDR       SIGNAL-TO-DISTORTION RATIO                             
 SEC       SECONDARY-ELECTRON CONDUCTIVITY TUBE                   
 SECAM     SYSTEME ELECTRONIQUE COLEUR AVEC MEMOIRE TELEVISION    
 SEM       SCANNING ELECTRON MICROSCOPE                           
 SEMI      SEMICONDUCTOR EQUIPMENT AND MATERIALS INTERNATIONAL    
 SHF       SUPER HIGH FREQUENCY                                   
 SHG       SECOND HARMONIC GENERATION                             
 SI        SYSTEME INTERNATIONAL UNIT                             
 SIA       SEMI-CONDUCTOR INDUSTRY ASSOCIATION                    
 SID       SUDDEN IONESPHERIC DISTURBANCE                         
 SIG       SPECIAL INTEREST GROUP                                 
 SIMD      SINGLE-INSTRUCTION-STREAM-MULTIPLE-DATA-STREAM         
 SIMIC     SIMULATED INTEGRATED CIRCUITS                          
 SIMM      SINGLE IN-LINE MEMORY MODULE                           
 SIP       SINGLE IN-LINE PACKAGE                                 
 SISD      SINGLE-INSTRUCTION-STREAM-SINGLE-DATA-STREAM           
 SLAC      STRAIGHT LINE ACCELLERATOR                             
 SLIC      SUBSCRIBER'S LINE INTERFACE                            
 SLM       SINGLE-LONGITUDINAL-MODE LASER                         
 SLT       SOLID LOGIC TECHNOLOGY                                 
 SMA       STANDARD MAINTENANCE ALLOWANCE                         
 SMDS      SWITCHED MULTIMEGABIT DATA SERVICE                     
 SMI       STRUCTURE OF MANAGEMENT INFORMATION                    
 SMPTE     SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS     
 SMR       SPECIALIZED MOBILE RADIO SYSTEMS                       
 SMR       SPECIALIZED MOBILE RADIO SYSTEMS                       
 SMS       SEMICONDUCTOR-METAL-SEMICONDUCTOR                      
 SMS       SEMICONDUCTOR-METAL-SEMICONDUCTOR PHOTODETECTORS       
 SNAFU     SITUATION NORMAL - ALL FOULED UP                       
 SNMP      SIMPLE NETWORK MANAGEMENT PROTOCOL                     
 SNR       SIGNAL/NOISE RATIO                                     
 SOA       SAFE OPERATING AREA                                    
 SOI       SILICON ON INSULATOR                                   
 SONET     SYNCHRONOUS OPTICAL NETWORK                            
 SOS       SILICON ON SAPPHIRE                                    
 SP        STOCHASTIC PROGRAMMING                                 
 SP        SWITCHING POINT                                        
 SPC       STORED-PROGRAM CONTROL                                 
 SPDT      SINGLE POLE DOUBLE THROW (SWITCH)                      
                              -16-



 SPECIAL   SPECIFICATION AND ASSERTION LANGUAGE                   
 SPG       SYNC-PULSE GENERATOR                                   
 SPICE     SIMULATION PROGRAM WITH INTEGRATED CIRCUIT EMPHASIS    
 SPL       SOUND PRESSURE LEVELS                                  
 SPOOL     SIMULTANEOUS PERIPHERAL OPERATIONS ON LINE             
 SPSC      SINGLE CHANNEL PER CARRIER DIVISION                    
 SPST      SINGLE POLE SINGLE THROW (SWITCH)                      
 SPW       SIGNAL PROCESSING WORK SYSTEM                          
 SQL       STRUCTURED QUERY LANGUAGE                              
 SQUID     SUPER-CONDUCTING QUANTUM INTERFERENCE DEVICE           
 SR        FLIP-FLOPS                                             
 SR        SATURABLE REACTOR                                      
 SRAM      STATIC RANDOM INTERFACE MEMORY                         
 SRPI      SERVER-REQUESTOR PROGRAMMING INTERFACE                 
 SRV       SERVER                                                 
 SSB       SINGLE SIDE BAND                                       
 SSBAM     SINGLE SIDEBAND AMPLITUDE MODULATION                   
 SSBAM-S   SINGLE-SIDEBAND AMPLITUDE MODULATION-SUPPRESSED CARRIER 
 SSCAD     SPACE STRUCTURE COMPUTER AIDED DESIGN                  
 SSI       SMALL SCALE INTEGRATION                                
 SSI       SINGLE SIGNAL INTERCONNECT                             
 SSOP      SURFACE-MOUNT SHRINK SMALL-OUTLINE PACKAGE             
 SSR       SOLID STATE RELAYS                                     
 SST       SINGLE SIDEBAND TRANSMISSION                           
 STC       SOUND-TRANSMISSION-TIME RATING                         
 STC       SENSITIVITY TIME CONTROL                               
 STC       SOUND-TRANSMISSION-CLASS RATINGS                       
 STL       STUDIO TRANSMITTER LINK                                
 STL       SCHOTTKY I2L                                           
 STP       SIGNAL TRANSFER POINT                                  
 STS       SYNCHRONY SERVICE AND TRANSPORT SYSTEM                 
 SVG       STATIC VAR GENERATOR                                   
 SVM       SCAN-VELOCITY MODULATION                               
 SYM       SYMBOLIC SYSTEM   
 TASI      SPEECH INTERPRETATION TECHNIQUES                       
 TCAS      TRAFFIC-ALERT AND COLLISION AVOIDANCE SYSTEM           
 TCM       TRELLIS CODED MODULATION                               
 TCP/IP    TERMINAL CONTROL PROGRAM                               
 TCSPC     TRUSTED COMPUTER SYSTEM EVALUATION CRITERIA            
 TCXO      TEMPERATURE-COMPENSATED CRYSTAL OSCILLATOR             
 TDM       TIME-DIVISION MULTIPLEXING                             
 TDMA      TIMR-DIVISION MULTIPLE ACCESS                          
 TE        TRANSVERSE ELECTRIC WAVES                              
 TE        THERMAL ELECTRIC COOLERS                               
 TED       TRANSFERRED ELECTRON EFFECT DEVICE  
 TEO       TRANSFERRED-ELECTRON OSCILLATOR                        
 TEP       TRANSEQUATORIAL PROPAGATION                            
 TES       TELEPHONY EARTH STATION                                
 TFT       THIN FILM TRANSISTOR                                   
                              -17-



 THG       THIRD HARMONIC GENERATION                              
 THG       THIRD HARMONIC GENERATION                              
 TIA       TELECOMMUNICATIONS INDUSTRY ASSOCIATION                
 TIGA      TEXAS INSTRUMENTS GRAPHICS ARCHITECTURE                
 TIP       TERMINAL INTERFACE PROGRAM                             
 TIP       TERMINAL INTERFACE PROCESSOR                           
 TLC       TRANMISSION LINE CALCULATOR                            
 TLD       TELEFONICA LONG DISTANCE OF PUERTO RICO                
 TLP       TRANSMISSION LEVEL POINTS                              
 TMA-MAX   OPERATING SYSTEM                                       
 TMN       TELECOM MANAGEMENT NETWORK                             
 TMS       TIME MUTIPLEXED SWITCH                                 
 TNM       TWISTED NEMATIC MODE                                   
 TNT       TRINITROTOLUENE SOUND SOURCE                           
 TOI       THIRD ORDER INTERCEPT POINT                            
 TPE       TEST PLANNING AND EVALUATION                           
 TQFP      THIN QUAD FLAT PACK                                    
 TR        TRANSMIT-RECEIVE TUBE                                  
 TRAPATT   TRAPPED PLASMA AVALANCHE TRIGGERED TRANSIT DIODE       
 TRIAC     TRIODE ALTERNATING CURRENT SEMICONDUCTOR SWITCH        
 TRIAC     BILATERAL SILICON-CONTROLLED RECTIFIER                 
 TS        TERMINAL SERVER                                        
 TSEM      TRANSMISSION SECONDARY-ELECTRON MULTIPLICATION         
 TSI       TIME SLOT INTERFACE                                    
 TSN       TELEMETRY SYSTEM FOR NEUROPHYSIOLOGY                   
 TSOP      THIN SMALL-OUTLINE PACKAGE                             
 TSR       TERMINATE & STAY RESIDENT PC PROGRAMS                  
 TSS       TANGENTIAL SIGNAL SENSITIVITY                          
 TTC       TELEMETRY TRACKING AND CONTROL                         
 TTL       TRANSISTOR-TRANSISTOR LOGIC                            
 TTY       TELETYPEWRITER                                         
 TUV       TRUE-VALUE                                             
 TVS       TELEPHONE VIDEO SYSTEM                                 
 TVS       TRANSIENT VOLTAGE SUPPRESSION                          
 TWT       TRAVELLING WAVE TUBE                                   
 UART      UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER            
 UDFFC     UNITY-DISPLACEMENT-FACTOR FREQUENCY CHANGER            
 UFC       UNRESTRICTED FREQUENCY CHANGER                         
 UHF       ULTRA HIGH FREQUENCY                                   
 UJT       UNIJUNCTION TRANSISTOR                                 
 UL        UNDERWRITERS LABORATORY                                
 UNI       BEARER USER NETWORK INTERFACE                          
 UNIOP     UNIVERSAL OPERATOR PANEL INSTRUMENTS                   
 UNIX      OPERATING SYSTEM                                       
 UPC       UNIVERSAL PRODUCT CODE                                 
 UPFFC     UNITY-POWER-FACTOR FREQUENCY CHANGER                   
 USART     UNIVERSAL SYNCHRONOUS-ASYNCHRONOUS RECEIVER TRANSMITTER 
 USAT      ULTRA SMALL APERTURE TERMINAL                          
 USB       UPPER SIDEBAND                                         
                              -18-



 USNC      U.S. NATIONAL COMMITTEE                                
 UTC       COORDINATED UNIVERSAL TIME                             
 UTP       UNSHIELDED PAIR                                        
 UTS       ULTIMATE TENSILE STRENGTH                              
 UV        ULTRA VIOLET                                           
 V/F       VOLTAGE-TO-FREQUENCY CONVERTER                         
 VAX       VIRTUAL ADDRESS EXTENSION                              
 VAX       DIGITAL EQUIPMENT TRADEMARK                            
 VBR       VARIABLE BIT RATE                                      
 VC        VIRTUAL CIRCUIT                                        
 VCO       VOLTAGE CONTROLLED OSCILLATOR                          
 VCR       VIDEO CASSETTE RECORDER                                
 VDE       VERBAND DEUTSCHER ELEKTRO TECHNIKER                    
 VDI       VIRTUAL DEVICE INTERFACE                               
 VDT       VIDEO DISPLAY TERMINAL                                 
 VENIX     OPERATING SYSTEM                                       
 VGA       VIDEO GRAPHIC ANALYSIS                                 
 VHDL      VERY-HIGH-SPEED INTEGRATED CIRCUIT                     
 VHF       VERY HIGH FREQUENCY BAND                               
 VHS       TYPE OF VIDEO RECORDER                                 
 VHSIC     VERY-HIGH-SPEED INTEGRATED CIRCUIT                     
 VIR       VERTICAL-INTERVAL-REFERENCE CIRCUIT                    
 VIT       VERTICAL INTERVAL TEST SIGNAL                          
 VLF       VERY LOW FREQUENCY BAND                                
 VLSI      VERY LARGE SCALE INTEGRATION                           
 VLSI      VERY LARGE SCALE INTEGRATED CIRCUIT                    
 VM        VUILLEUMIER CYCLE REFRIGERATOR                         
 VME       VERSA MODULE EUROPE (SINGLE BOARD COMPUTER)            
 VMOS      V-GROOVE METAL OXIDE SEMICONDUCTOR                     
 VPM       VIDEO PROCESSOR MODULE                                 
 VPN       VIRTUAL PRIVATE NETWORK                                
 VSAM      VIRTUAL STORAGE ACCESS METHOD                          
 VSAM      VIRTUAL STORAGE ACCESS METHOD                          
 VSAT      VERY SMALL APERTURE TERMINAL                           
 VSBAM     VESTIGIAL SIDEBAND AMPLITUDE MODULATION                
 VSWR      VOLTAGE STANDING WAVE RATIO                            
 VTM       VOLTAGE-TUNABLE MAGNETRON                              
 VTR       VIDEO TAPE RECORDER                                    
 VTS       VIRTUAL TERMINAL SERVICE                               
 VU        VOLUME UNIT                                            
 VXI       BASE MODULE                                            
 WAN       WIDE AREA NETWORK                                      
 WAN       WIDE AREA NETWORKING                                   
 WARC      WORLD ADMINISTRATIVE RADIO CONFERENCE                  
 WGN       WHITE GAUSSIAN NOISE                                   
 WGN       WHITE GAUSSIAN NOISE                                   
 WO        WRITE ONLY                                             
 WORM      WRITE ONCE/READ MANY                                   
 WWV       STANDARD FREQUENCY AND TIME TRANSMISSIONS              
                              -19-



 WYGINS    WHAT YOU GET IS NO SURPRISE                            
 WYSIWYG   WHAT YOU SEE IS WHAT YOU GET                           
 XENIX     OPERATING SYSTEM                                       
 XGA       EXTENDED GRAPHICS ARCHITECTURE                         
 XMA       EXPANDED MEMORY ADAPTER                                
 XMODEM    COMMUNICATION PROTOCOL                                 
 XOR       GATE                                                   
 XTK       CROSSTALK TOOL KIT                                     
