AROS
AROS Research Operating System

BWIA
BWIA West Indies Airways

CAVE
Cave Automatic Virtual Environment

EINE
EINE Is Not Emacs

GES
GES Exposition Services

GNE
GNE’s Not an Encyclopedia

GNU
GNU’s Not Unix

FIJI
FIJI Is Just ImageJ

Heil
Heil Environmental Industries Limited

KDE
KDE Desktop Environment

LINK
Link Interchange NetworK

LiVES
LiVES is a Video Editing System

LAME
LAME Ain’t an MP3 Encoder

Mung
Mung Until No Good

Ninja-IDE
Ninja-IDE Is Not Just Another IDE

PHP
PHP: Hypertext Preprocessor

PIP
PIP Installs Packages

P.I.P.S.
P.I.P.S. Is POSIX on Symbian

PINE
PINE Is Nearly Elm, originally; PINE now officially stands for „Pine Internet News and E-mail“

SPARQL
SPARQL Protocol And RDF Query Language