RATIONAL AND TOWER TECHNOLOGY ANNOUNCE AVAILABILITY OF THE EIFFEL BOOCH
COMPONENTS

AUSTIN, TX -- June 6, 1994 -- Tower Technology and Rational Software
Corporation announced today the availability of the Eiffel Booch
Components. Previously, the Booch Components, a leading object-oriented
call library, were only available for C++ and Ada.

The Eiffel Booch Components are a result of an alliance between Tower and
Rational to convert the Booch Components to Eiffel, an advanced,
non-proprietary object-oriented language that promotes software
reusability and correctness. Under the agreement, Tower and Tower will
share exclusive worldwide marketing rights to the Eiffel Booch Components.
This alliance gives Rational entry to the growing Eiffel marketplace while
enabling Tower to enhance and expand its product offering.

"Eiffel is a growing segment of the object-oriented development market,"
said Grady Booch, chief scientist at Rational and developer of the
original Booch Components. "The Eiffel Booch Components provide developers
with a library of robust, high quality, reusable classes that they can use
to reduce development time and free them to focus on domain-specific part
of their applications."

"The primary focus for Tower has been to bring Eiffel into the mainstream
for commercial object-oriented software development by providing open
tools and services" said Robert Howard, CEO and President of Tower. "Our
latest release of the TowerEiffel System provides combined support for C,
C++, Objective C, and Eiffel. Now with an Eiffel version of the Booch
Components, developers will have access to another mainstream product they
can use in conjunction with Eiffel to build their applications."

The Eiffel Booch Components are available immediately for $995 from Tower
Technology.

Rational Software Corporation provides innovative, object-oriented,
software engineering solutions that reduce the risks associated with
designing, developing, and delivering complex software system. Rational's
products address the entire software development lifecycle and include
integrated tools for Ada and C++, reusable components, and a complete
suite of training and consulting services. Founded in 1980, Rational
Software Corporation (NASDAQ symbol: RATL) has headquarters in Santa
Clara, California, and regional sales and supports offices in the United
States, Canada, the United Kingdom, France, Sweden, Germany, Taiwan, and
Australia. The company also has partners and distributors worldwide.

Tower Technology Corporation provides a line of advanced tools and services
for developing large complex object-oriented based systems. Tower products
include: The TowerEiffel System (a complete object oriented programming
system that bundles a high performance Eiffel 3 compiler, an integrated
programming environment, a set of powerful programming tools, and a base
set of reusable software components) and Tower Integrated Components (a
set of proven libraries including the Eiffel Booch Components as well as
components for GUI, database, and operating system interface development).
Tower Support Services include product support, educational and consulting
services, specialized research and development, and a range of books and
publications devoted to Eiffel and object oriented technology. The company
was established in 1992 by the merger of Tower Associates and Rock Solid
Software.

The Eiffel language, created in 1986, is a non-proprietary advanced object
oriented programming language which has software engineering principles
build into the language. Key features of Eiffel include its clean syntax
and powerful object model as well as automated support for memory
management, quality assurance and documentation generation. Eiffel has
been popular in academia since the late 80's for teaching OO concepts and
is gaining popularity for commercial development, both as an OO design
specification language and as an application development system. NICE (
the Non-Profit International Consortium for Eiffel ) controls the
language's standards and holds the Eiffel trademark.

Tower Technology
3300 Bee Caves Rd, Suite 650
Austin, TX 78746
512-452-9455,  800-285-5124,  fax 512-452-1721
Internet: tower@twr.com

Rational Software Corporation
2800 San Tomas Expressway
Santa Clara, CA 95051-0951
Tel. (408) 496-3600 or (800) 767-3237
Fax (408) 496-3636
E-mail: product_info@rational.com

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