I happen to know a thing or two about printing, PDF, PostScript, PJL, Fonts and related stuff.
Also familiar with some bits and pieces of Linux, Unix, Samba and Solaris printing. Not to forget bash programming and Windows cmd.exe batch scripting. I also do consultancy in these topics.
If you want, I share some of this knowledge here and on Stackoverflow (SO). Just click to browse for all.
Q&A for professional and enthusiast programmers
Q&A for computer enthusiasts and power users
Q&A for professional system and network administrators
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for power users of Apple hardware and software
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for Information security professionals
Q&A for people studying math at any level and professionals in related fields