Does anyone know of any good online sources to learn to use postscript for programming?
At http://www.rightbrain.com/pages/book-download.shtml you can download the PDF version of the excellent 'Thinking in PostScript'.
And if you run Windows, don't be tricked into thinking you have to pay $50 or the eMatter version (what a scam!). The PDF will work perfectly well.
Linux focus had an intro article. It doesn't cover postscript as a programming language, and I'm not sure that it is really "correct" but oh well. http://www.linuxfocus.org/English/May1998/article43.html
Then there is also All About Postscript. Haven't read it thoroughly, but it looks like it might be good. http://www.quite.com/ps/
See also