To use sources You must have JDK 1.0

To compile this program type: javac Prolog.java

To run program type: java Prolog [-t] [-r] filename.pro

use option -t to view trace of program execution

use option -r to do automatic returns

Note: This program is not freeware and not final public version.
      It is not copmletely tested and optimized.
      Anybody have not permission to use sources.
