L
- lag
 - lamer
 - LAN party
 - language lawyer
 - languages of choice
 - LART
 - larval stage
 - lase
 - laser chicken
 - leaf site
 - leak
 - leaky heap
 - leapfrog attack
 - leech
 - leech mode
 - legal
 - legalese
 - lenna
 - LER
 - LERP
 - let the smoke out
 - letterbomb
 - lexer
 - life
 - Life is hard
 - light pipe
 - lightweight
 - like kicking dead whales down the beach
 - like nailing jelly to a tree
 - line 666
 - line eater, the
 - line noise
 - linearithmic
 - link farm
 - link rot
 - link-dead
 - lint
 - Lintel
 - Linus
 - Linux
 - lion food
 - Lions Book
 - LISP
 - list-bomb
 - lithium lick
 - little-endian
 - live
 - live data
 - Live Free Or Die!
 - livelock
 - liveware
 - lobotomy
 - locals, the
 - locked and loaded
 - locked up
 - logic bomb
 - logical
 - loop through
 - loose bytes
 - lord high fixer
 - lose
 - lose lose
 - loser
 - losing
 - loss
 - lossage
 - lossy
 - lost in the noise
 - lost in the underflow
 - lots of MIPS but no I/O
 - low-bandwidth
 - Lubarsky’s Law of Cybernetic Entomology
 - Lumber Cartel
 - lunatic fringe
 - lurker
 - luser