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Wordnet 3.0

NOUN (1)

1. sandwich filled with slices of bacon and tomato with lettuce;
[syn: bacon-lettuce-tomato sandwich, BLT]


WordNet (r) 3.0 (2006):

BLT n 1: sandwich filled with slices of bacon and tomato with lettuce [syn: bacon-lettuce-tomato sandwich, BLT]
V.E.R.A. -- Virtual Entity of Relevant Acronyms (September 2014):

BLT BLock Transfer
The Jargon File (version 4.4.7, 29 Dec 2003):

BLT /B?L?T/, /bl@t/, /belt/, n.,vt. Synonym for blit. This is the original form of blit and the ancestor of bitblt. It referred to any large bit-field copy or move operation (one resource-intensive memory-shuffling operation done on pre-paged versions of ITS, WAITS, and TOPS-10 was sardonically referred to as ?The Big BLT?). The jargon usage has outlasted the PDP-10 BLock Transfer instruction from which BLT derives; nowadays, the assembler mnemonic BLT almost always means ?Branch if Less Than zero?.
The Free On-line Dictionary of Computing (18 March 2015):

BLT 1. /B-L-T/, /bl*t/ or (rarely) /belt/ Synonym for blit. This is the original form of blit and the ancestor of bitblt. It refers to any large bit-field copy or move operation (one resource-intensive memory-shuffling operation done on pre-paged versions of ITS, WAITS and TOPS-10 was sardonically referred to as "The Big BLT"). The jargon usage has outlasted the PDP-10 BLock Transfer instruction from which BLT derives; nowadays, the assembly language mnemonic BLT almost always means "Branch if Less Than zero". 2. bacon, lettuce and tomato (sandwich). [Jargon File]