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The Free On-line Dictionary of Computing (foldoc)

/blit/ 1. To copy a large array of bits from one part of a
computer's memory to another part, particularly when the
memory is being used to determine what is shown on a display
screen. "The storage allocator picks through the table and
copies the good parts up into high memory, and then blits it
all back down again." See {bitblt}, {BLT}, {dd}, {cat},
{blast}, {snarf}. More generally, to perform some operation
(such as toggling) on a large array of bits while moving them.

2. Sometimes all-capitalised as "BLIT": an early experimental
{bit-mapped} {terminal} designed by Rob Pike at {Bell Labs},
later commercialised as the {AT&T 5620}. (The folk etymology
from "Bell Labs Intelligent Terminal" is incorrect. Its
creators liked to claim that "Blit" stood for the Bacon,
Lettuce, and Interactive Tomato).

[{Jargon File}]

(1994-11-16)