Coding

GNU

• The Free Software Dictionary

Java

• Sun Java tutorials

HTML

• HTML 4.01/XHTML reference page
• Span formats (including mouse hover)
• HTML ASCII quick reference
• HTML URL encoding quick reference

Post Script

• Post Script FAQ

C

• C-FAQ.com

Modeling

AMPL (Linear Programming)

• Robert Fourer, AMPL: "A Mathematical Programming Language"

Scripting

CGI

• CGI Made Really Easy

PHP

• PHP Tutoial
• PHP vs. Pearl scripting
• Installing PHP on Windows
• PHP.net
• Installing Apache server on Windows
• Function for loading the contents of web pages into a variable
• Regular Expressions Quick Reference

Assembly

• > Assembly programming tutorial
• Unix assembly programming
• Assembly programming tutor from U Akron
• List of assembly tutorials (Linux)

Interfaces

• List of articles on port programming