Introduction to color theory [Web]
Using xfig to draw pictures [Web]
Using the flatbed scanner [Web]
OCR (Optical Character Recognition): Converting paper documents to text [Web]
Writing documentation with DocBook-XML 5.0 [Web]
Writing documentation with DocBook-XML 4.3 [Web]
The ISO 9573-2003 Unicode entity group: A rich, international character set [Web]
DocBook 4.3 Quick Reference [Web]
Plain TeX quick reference [PDF]
Using PostScript fonts with TeX [PDF]
Summary of PostScript fonts in TeX [PDF]
