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Math reference works and essays. Full index at Xah Math. The following are popular topics.

curve icon

Visual Dictionary of Special Plane Curves

surface icon

Surface Gallery

wall paper icon

Wallpaper Groups

tiling icon

Math Graphics Gallery

much more at Xah Math


Tutorials, Critiques, Commentaries on aspects of the computing industry, technical & social. Index at Computing & its People.

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JavaScript Tutorial

visual css

Visual Dictionary of CSS


Linux Tutorial

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Perl & Python Tutorial

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Unicode Search

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All You Ever Need to Know About Keyboards ⌨

on Programing Languages

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Emacs Lisp

much more at Computing and Its People