Here are a few:

RTFM - Read The F*** Manual
Apache Web Server - "A PATCHY web server" patch after patch
SED - Stream EDitor
AWK - Alfred Aho, Peter Weinberger and Brian Kernighan
SSH - Secure SHell
Unix - UNIpleXed Information and Computing System
Linux - LINUs' UniX
Ole - Object Linking and Embedding
OleDB - Object Linking and Embedding DataBase
DAO - Data Access Objects
RDO - Remote Data Objects
ADO - ActiveX Data Objects
ORM - Object Relational Mapping
SQL - Structured Query Language
JRE - Java Runtime Environment
RoR - Ruby On Rails
PERL - Practical Extraction and Report Language (camel)
Fortran - FORmula TRANslation
BASIC - Beginner's All-purpose Symbolic Instruction Code
COBOL - COmmon Business Oriented Language
Lisp - LISt Processing
PASCAL - Pattern Analysis, Statistical modelling and ComputAtional Learning

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