Refer also to the Resources/Databases for Developers Page which has links to source code and compiler information. Word of Warning: if trying out multiple compilers on your system, only have the environment and path variables from a single Compiler enabled in your c:\autoexec.bat or environment setup. Also for DOS, Win 3.1x and Win95 make sure you have enough environment variable space with something like the following in your c:\config.sys For Win95 - SHELL=C:\WINDOWS\COMMAND\COMMAND.COM C:\ /E:2048 /P For DOS/Win3.1x - SHELL=C:\DOS\COMMAND.COM C:\DOS\ /E:1024 /P