This submission contains a quad-fat demo version 3.3 of 
PhaseScope for Motorola, Intel, HP PA-RISC, and SPARC based 
computers.

PhaseScope(tm) provides a comprehensive user-interface and 
general graphical display for analyzing dynamical systems.  
It serves as a specialized front end to Mathematica's kernel, 
and can be used as a general purpose modeling tool, where one 
can easily check the qualitative behavior of the assumptions 
before proceeding to a detailed analysis.  

In addition, PhaseScope can also be used as a learning tool 
supporting several topics in a typical course in differential 
equations.  PhaseScope provides color 2D and 3D graphical 
displays of the dynamical system.

PhaseScope 3.3 includes an on-line NEXTSTEP help facility, and 
the following new features:

1. Equations can now be defined in terms of parameters, whose 
   values can be adjusted independently. This feature makes it 
   easy to change critical components of the equations easily.

2. When displaying a solution in the phase-plane, clicking 
   anywhere in the plane will define an initial position and 
   subsequently display the new solution for those initial 
   conditions. This make it easy to experiment with phase-plane 
   stability.

PhaseScope 3.3 is available direct from Impact Software and 
through authorized NEXTSTEP resellers. Information about quantity 
discounts, site licenses, and reduced prices for educational 
customers can be obtained by contacting Impact Software directly.

Retail Price: $245.00
Internet Price: $195.00 (for users who have a demo copy)
Availability: Shipping now for Motorola, Intel, HP PA-RISC, and 
              SPARC based computers.

Contact:  Impact Software Publishing, Inc.
          36-32 34th Street, Long Island City, NY 11106
          Phone: 1-800-822-3385 / 718-472-0600 
          Fax: 718-472-0160
          E-mail: info@impact.com

***
PhaseScope is a trademark of Impact Software Publishing, Inc. 
NEXTSTEP is a trademark of NeXT, Inc. All other trademarks 
mentioned belong to their respective owners.