Software development
ANSI C Quick Reference Card
Joseph H. Silverman
CVS Quick Reference Card
Andrew Ford
A tri-fold PDF reference for the CVS version control system.
CVS Quick Reference Card 
Laurent Grégoire
DOC++
Steven Gould
A two-page, tri-fold guide to the DOC++ documentation system.
GDB Quick Reference
Roland H. Pesch
MIPS Reference Card
Jan Wätzig
two page overview of MIPS32 assembler
Regular Expressions Cheat Sheet
Dave Child
single page, A4 cheat sheet on regular expressions
Key
| tri-fold PDF |
| single-sided portrait PDF |
| double-sided portrait PDF |
 | multi-page portrait PDF |
 | single-sided landscape PDF |
 | double-sided landscape PDF |
 | multi-page landscape PDF |
 | online document |
| information (external cards) |
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