VISUAL NUMERICS ANNOUNCES NEW IMSL DEVELOPMENT TOOLS FOR WINDOWS NT AT PC
EXPO

Company launches mathematical, statistical and graphical libraries for C
developers using Intel-based PCs running Windows NT

June 28, 1994 -- NEW YORK -- Visual Numerics, Inc., a developer of
application development tools (ADTs) for software programmers, today
announced at PC Expo '94 that it will begin shipping in September new
Windows NT versions of its IMSL C Numerical Libraries and IMSL Exponent
Graphics. These 32-bit Libraries will support Intel Corp.-based personal
computers running Microsoft Corp.'s Visual C++ compiler under Windows NT.

The new Windows NT Libraries extend the platform coverage of the current
IMSL tools. They are aimed at developers who are familiar with IMSL tools
on mainframes or workstations and want to downsize, as well as PC-based C
programmers who want to save time by using prewritten code. The Libraries
are designed to significantly reduce code development, porting and
maintenance of mission-critical applications.

The IMSL C Numerical Libraries are collections of user-callable
mathematical and statistical subroutines that help maximize the
performance of computer systems and speed the development of software
applications by providing "building blocks" for the programmer. By
embedding the Libraries' prepackaged subroutines directly into their C
applications, programmers avoid having to write the code from scratch and
reduce development time by up to 95 percent.

Widely regarded as an industry standard, the IMSL C Numerical Libraries are
comprised of more than 900 subroutines for linear systems, interpolation
and approximation, differential equations, transforms, nonlinear
equations, optimization, random number generation, time series,
probability, and regression, among others.

IMSL Exponent Graphics for Windows NT, like its Unix counterpart, provides
over 30 presentation-quality 2D and 3D technical graphs through high-level
function calls. The product features a built-in interactive graphical user
interface for plot development and prototyping. The GUI lets users
manipulate data, including real-time rotation of 3D graphs. In addition,
users can choose from among 300 customizable graph attributes (fonts,
colors, line types, shading, etc.) and several high-performance output
drivers. The Windows NT version of Exponent Graphics includes a Fortran
application programmer interface (API), which supports Microsoft's 32-bit
PowerStation compiler. Either the C or Fortran API can be selected by the
user during installation.

The new Windows NT Libraries are identical to the current Unix products,
which have been available for more than 20 years and are used by some
200,000 developers worldwide. The Windows NT Libraries include
comprehensive Windows-based online documentation, which provides instant
access to hundreds of algorithm explanations, references, and code
examples through hypertext links. To facilitate quick application
development, nearly 600 code and graphics examples can be copied and
pasted directly into the developer's source code.

The domestic price for the IMSL C Numerical Libraries for Windows NT is
$695; IMSL Exponent Graphics for Windows NT is $895. A bundled package of
both the numerical and graphical libraries costs $1,195.

Headquartered in Houston, Visual Numerics employs some 165 persons
worldwide. The privately held company has product development operations
in Houston and Boulder, Colo. Through its subsidiaries in France, Germany,
Japan and the United Kingdom, and its worldwide distributor network,
Visual Numerics sells its IMSL and PV-WAVE products in 65 countries.

Visual Numerics, Inc.
9990 Richmond Avenue, Suite 400,
Houston, Texas 77042-4548, USA
Telephone: (713) 784-3131,   Facsimile: (713) 781-9260

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