C
- C
- C Programmer's Disease
- C&C
- C++
- calculator
- Camel Book
- camelCase
- camelCasing
- can't happen
- cancelbot
- Cancelmoose[tm]
- candygrammar
- canonical
- careware
- cargo cult programming
- cascade
- case and paste
- case mod
- casters-up mode
- casting the runes
- cat
- catatonic
- cathedral
- cd tilde
- CDA
- cdr
- chad
- chad box
- chain
- chainik
- channel
- channel hopping
- channel op
- chanop
- char
- charityware
- chase pointers
- chawmp
- check
- cheerfully
- chemist
- Chernobyl chicken
- Chernobyl packet
- chicken head
- chickenboner
- chiclet keyboard
- Chinese Army technique
- choad
- choke
- chomp
- chomper
- CHOP
- Christmas tree
- Christmas tree packet
- chrome
- chug
- Church of the SubGenius
- CI$
- Cinderella Book
- Classic C
- clean
- click of death
- CLM
- clobber
- clock
- clocks
- clone
- clone-and-hack coding
- clover key
- clue-by-four
- clustergeeking
- co-lo
- coaster
- coaster toaster
- COBOL
- COBOL fingers
- cobweb site
- code
- code grinder
- code monkey
- Code of the Geeks
- code police
- codes
- codewalker
- coefficient of X
- cokebottle
- cold boot
- COME FROM
- comm mode
- command key
- comment out
- Commonwealth Hackish
- compact
- compiler jock
- compo
- compress
- Compu$erve
- computer confetti
- computron
- con
- condition out
- condom
- confuser
- connector conspiracy
- cons
- considered harmful
- console
- console jockey
- content-free
- control-C
- control-O
- control-Q
- control-S
- Conway's Law
- cookbook
- cooked mode
- cookie
- cookie bear
- cookie file
- cookie jar
- cookie monster
- copious free time
- copper
- copy protection
- copybroke
- copycenter
- copyleft
- copyparty
- copywronged
- core
- core cancer
- core dump
- core leak
- Core Wars
- cosmic rays
- cough and die
- courier
- cow orker
- cowboy
- CP/M
- CPU Wars
- crack
- crack root
- cracker
- cracking
- crank
- crapplet
- CrApTeX
- crash
- crash and burn
- crawling horror
- CRC handbook
- creationism
- creep
- creeping elegance
- creeping featurism
- creeping featuritis
- cretin
- cretinous
- crippleware
- critical mass
- crlf
- crock
- cross-post
- crossload
- crudware
- cruft
- cruft together
- cruftsmanship
- crufty
- crumb
- crunch
- cryppie
- cthulhic
- CTSS
- cube
- cup holder
- cursor dipped in X
- cuspy
- cut a tape
- cybercrud
- cyberpunk
- cyberspace
- cycle
- cycle of reincarnation
- cycle server
- cypherpunk
- C|N>K