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]
