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]
Nearby terms:
blow past « blow up « BLOX « BLT » Blue » Blue Book » Blue Box
