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The BRL-CAD Package is a powerful Constructive Solid Geometry (CSG) based
solid modeling system. BRL-CAD consists of over 100 different programs,
including an interactive geometry editor, a ray tracing library, two 
ray-tracing based lighting models, a generic framebuffer library, a
network-distributed image-processing and signal-processing capability,
and a large collection of related tools and utilities. Release 4.0 is the
latest version of software which has been undergoing continuous development
since 1979. 

The BRL-CAD documentation is distributed in five volumes:

  Volue I    The BRL-CAD Philosophy
  Volue II   The BRL-CAD User's Manual
  Volue III  The BRL-CAD Applications Manual
  Volue IV   The MGED User's Manual
  Volue V    The BRL-CAD Analyst's Manual

To obtain a copy of this documentation, contact:

  BRL-CAD Distribution
  Attn: SCLBR-LV-V
  Aberdeen Proving Ground, MD 21005-5066
  Email: keith@brl.mil

For general information about BRL-CAD, contact:

  BRL-CAD Architect
  Attn: Mike Muuss
  U.S. Army Research Laboratory
  Aberdeen Proving Ground, MD 21005-5068
  Email: mike@brl.mil

Additional BRL-CAD information may be found at:

  BRL-CAD Home Page
  http://web.arl.mil/software/brlcad/index.html

  BRL-CAD Technical Reports
  http://web.arl.mil/reports/