BLT
:BLT: /B-L-T/, /bl*t/ or (rarely) /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'.
Jargon File Version 4.3.1, 29 JUN 2001 =
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