Development tools for other languages such as Fortran, COBOL, and Ada, as well as fourth-generation languages associated with databases and scripting languages, are provided by third-party vendors for SCO platforms. The GNU g77 Fortran compiler is provided as part of the GNU Development Tools, included with SCO OpenServer. Also, there may be Open Source solutions that you can use, such as the GNU-based GNAT Ada 95 compiler.