From JoatWiki

Contents 1 A 2 C 3 F 4 I 5 N 6 R 7 S 8 T 9 U

A

• ANSI - American National Standards Institute
  
• AUP - Acceptible Usage Policy
  

C

• CRC - Cyclic Redundancy Check

F

• FBI - Federal Bureau of Investigation
  
• FUD - Fear, Uncertainty and Doubt

I

• IRC - Internet Relay Chat
  

N

• NOC - Network Operations Center
  
• NSOC - Network Security Operations Center
  

R

• RTFM - Read The Fine Manual (This is the polite version. The F-Word is usually the f-word)
  

S

• SOP - Standard (or Standardized) Operating Procedure
  

T

• TLA - Three Letter Acronym (ok, it's self-referential)

U

• UGT - Universal Greeting Time (see glossary)