As I commented earlier, my only source for Pascal programming information for a beginner is a short course of Borland Turbo Pascal in windoze. I too have installed the Gnu Pascal Compiler in Linux, so I thought it would be possible to learn with the former to use latest. Is there any document that explains (from scratch) the very basic differences between one and another? I hope you will excuse my lack of knowledge, but as I said these are my very first attempts to learning programming at all. Now, from the very first basic program (I guess sort of C's "hello world"): Program saludo; Uses WinCrt; Begin {1} WriteLn ('Hola Mundo'); End. I can only guess that the above syntax is correct both in windoze and Linux, except for the include file "WinCrt", but... how can I implement these for Unix/Linux? TIA Horacio