ProgrammingPostscript

Some useful links on programming PostScriptLanguage by hand (as I'm currently writing a Patterning renderer to PostScript.

https://personal.math.ubc.ca/~cass/courses/m309-03a/a2/pscrash.pdf

https://personal.math.ubc.ca/~cass/graphics/text/www/pdf/ch6.pdf

http://paulbourke.net/dataformats/postscript/