Propagator (TM) is a GUI-based backpropagation neural network development software from ARD Corporation. It runs on Sun Solaris 1.x and 2.x with Motif GUI, on PC with Windows 3.x GUI, and on Macintosh System 7.x with Toolbox GUI. Users can train networks easily and quickly. Every feature of the software is accessable from the GUI consisting of only three major dialogs and three graph windows. Also included are a data preprocessing tool (Scale) and a network source code generator (NetGen). For more information, contact ARD at the following address: ARD Corporation 9151 Rumsey Road Columbia, MD 21045 Phone: (410) 997-5600 FAX: (410) 997-3902 Email: propagator@ard.com