IT

Internal Translator

A. J. Perlis et al, Carnegie Tech, about 1957.

An early compiler for mathematics, originally for the Burroughs 205 computer, later the IBM 650. It was the forerunner of RUNCIBLE, GATE, CORRELATE and GAT. IT source code was converted to PIT, and thence to SPIT.

CACM 1(5):22 (1958).

IT-2

Produced machine language directly.

IT-3

Developed at Carnegie. Added double-precision floating point.