Neural networks have been developing into a valuable
tools for chemists.  Feed-forward, back propagation (FF-BP)
neural networks have been most commonly used in
a "regression-like" mode to derive models in
chemical data, (known outputs are "taught" or
"learned" by the neural network from input parameters).
The program WinNN32 is a user friendly, shareware
program for Windows 95/NT (only) that is useful
to learn the details of FF-BP neural networks.