Programming/Scripting
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ASP.NET/VBScript
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AWK
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C/C++
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C#
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Delphi
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Erlang
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Fortran
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Java
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JSP
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MFC
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PERL
- Perl pack/unpack Summary
 - Perl Predefined Variables
 - Perl Quick Reference Guide
 - Perl Reference Card
 - Perl Best Practices Reference Guide
 - Perl Debugger Quick Reference Card
 - Perl Quick Reference Card
 - Perl Regular Expression Quick Reference Card
 - PERL Regular Expression Quick Reference 1.04
 - PERL Win32 Quick Reference
 
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PHP
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PYTHON
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Ruby
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TCL/TK
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Visual Basic
 
Operating Systems
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AIX
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IOS
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Solaris
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UNIX/LINUX
- Bash help sheet - shortcuts
 - Bash History Cheat Sheet
 - Bash Reference
 - Debian GNU/Linux Reference Card
 - Unix/Linux Command Reference
 - Novell Linux Quick Reference Guide
 - LINUX Administrator�s Quick Reference Card
 - Linux Security Quick Reference Guide
 - LINUX Admin Quick Reference
 - Using Linux the CLI way - Cheat Sheet
 - UNIX/LINUX REFERENCE CARD
 - LINUX System Call Quick Reference
 - Set Operations in the Unix Shell
 - THE ONE PAGE LINUX MANUAL
 - Unix commands reference card
 - UNIX TOOLBOX
 
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VIOS
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Windows
 
Standards and protocols
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Network
- BGP
 - EIGRP
 - FIRST HOP REDUNDANCY
 - IEEE 802.1X
 - IEEE 802.11 WIRELESS
 - IEEE 802.1X
 - IEEE 802.11 WLAN
 - IPSEC
 - IPV4 MULTICAST
 - IPV4 SUBNETTING
 - IPV4 MULTICAST
 - IPV6
 - INTEGRATED IS-IS
 - FRAME MODE MPLS
 - NETWORK ADDRESS TRANSLATION
 - OSPF
 - POINT-TO-POINT PROTOCOL
 - QUALITY OF SERVICE
 - SPANNING TREE
 - TCP/IP and tcpdump
 - TCP/IP Cheat Sheet
 - VLANS
 
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Misc