To be able to program in GIPSY, it is required that the programmer has a good understanding of how GIPSY is used. ... Programming languages supported by GIPSY are Sheltran, Fortran 77 and ANSI C. Sheltran (or S77) is a simple Fortran pre-compiler language which enables the programmer to write structured programs. ... See compile.doc . ... Users who have developed software which can be generally useful, are encouraged to install it in GIPSY or have it installed by the GIPSY manager. ...