User training courses are available. Custom development of tools is also available.

1 The Chem Viewer is not compatible with ULTRIX version 4.3 or higher. Technical support is limited to non-hardware and non-operating system specific problems.

2 The Chem Viewer has not been tested with operating systems higher than version 4.2. Technical support is limited to non-hardware and non- operating system specific problems.

3 The Chem Viewer has not yet been tested with the Solaris operating system.

* Support for this platform is not anticipated past Q2/1994. Migration pathways will be provided to purchasers of the Chem Viewer for this platform.

FOR IMMEDIATE RELEASE

DASGROUP AND MOLECULAR SIMULATIONS SIGN AVS CHEMISTRY VIEWER DEVELOPMENT AND MARKETING AGREEMENT

Burlington, MA, December 20, 1993 -- DASGroup of Toledo, OH and Molecular Simulations Inc. (MSI) announced that they have finalized an agreement under which DASGroup will undertake scientific development, technical support, marketing and sales of the AVS Chemistry Viewer, a program for the visualization of the results of computational chemistry calculations.

Under the terms of the agreement, DASGroup will immediately begin marketing and sales efforts of the product throughout most of the world. Teijin Molecular Simulations Inc. (TMSI), a joint venture of MSI and Teijin Limited, will continue as the exclusive distributor of AVS Chemistry Viewer in the Far East. In addition, DASGroup will immediately take over scientific and technical development and worldwide support of the Chemistry Viewer.

"The Chemistry Viewer is an excellent, extensible tool for visualization of computational chemistry input and output, analysis of results, and transfer of information between various programs," said Dr. Douglas A Smith, President of DASGroup. "We plan to enhance and extend the Chemistry Viewer to be a user friendly graphical interface to as many computational chemistry programs as possible over the next year, including programs for quantum mechanics, molecular mechanics and dynamics, Monte Carlo and FEP, crystallography and more. Protein display and analysis tools are high on our list of priorities as well."

"MSI is delighted that it has found an excellent home for the continued development and distribution of the AVS Chemistry Viewer product," said Michael J. Savage, President and CEO of MSI. "This arrangement will allow MSI to focus additional resources on the continued development of computational chemistry applications within MSI's own development environment".

Founded in 1984, Molecular Simulations Inc. is a privately-held company with yearly revenues in excess of $20 million. MSI's products enable scientists to predict the behavior and properties of organic and inorganic materials through molecular modeling, a technique that simulates and visualizes materials at an atomistic level. Companies and academicians around the world have found that simulation technology can help increase the efficiency and productivity of research, development, and manufacturing processes in industries as diverse as biotechnology, pharmaceuticals, agriculture/food processing, and materials sciences. The company has the world's largest installed base of licensed applications and the industry's broadest line of modeling and visualization software. MSI develops products for many major workstations and scientific computing platforms. Headquartered in Burlington, MA, the company has 130 employees worldwide.

DASGroup, founded in 1992, is a privately-held company which specializes in molecular modeling and computational chemistry, both products and applications. The company performs contract research and development in a variety of areas and sells products including software for visualization.