List of computer-related jargon

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For internet slang see List of Internet slang and List of Internet slang specific to thread-based communication
For computer gaming slang, see List of online-gaming slang
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This is a list of slang about computers, computer programs, computer programming, and people that deal with computers:

BW 
"bandwidth"
C|N>K 
"coffee through nose into keyboard" (a Unix-ism involving the command line pipe and redirect characters)
CG 
"computer graphic"
CTD 
"crash to desktop"
CS 
"Computer science"
D/C 
"disconnected"
D/L 
"download"
DoS 
"Denial of Service" (a malicious attack on a computer system)
DOS 
"Disk Operating System"
DSL 
"digital subscriber line"
EBKAC 
"error between keyboard and chair" (See: PEBKAC)
EULA 
"End User License Agreement"
FTP 
"file transfer protocol" or "first to post"
FXP 
"file exchange protocol"
Guru 
an expert in some technical topic such as computer programming or systems administration
IE 
Internet Explorer web browser
IRC 
Internet Relay Chat
M$ 
"Microsoft"
OC  
"Overclock" (generally used as tech talk. Can also be used as "OCed" as in overclocked)
OOM 
"out of memory"
OS 
"Operating System"
PEBKAC 
"problem exists between keyboard and chair"
PIC 
"program interrupt controller"
PICNIC 
"problem in chair, not in computer"
SysOp 
"system(s) operator"
TBUC 
"technology beyond user comprehension"
UA 
"User Agreement"/"User Agent"
VoIP 
"Voice over IP" (phone conversations over a broadband connection)
WYSIWYG 
"what you see is what you get" (pronounced "wizzywig"; printed output will look identical to its screen representation)