UNIVAC 490

It was a commercial derivative of the instruction set that had been developed for the AN/USQ-17 by Seymour Cray for the United States Navy.

This was the last machine that Cray designed before leaving UNIVAC to join the early Control Data Corporation.

Six were installed at NASA and played important roles in Gemini and the Apollo missions.

[2] Airlines using the 490 Real-Time system included Eastern and Northwest Orient – principally airline reservations systems at Eastern Air Lines (1963) and British European Airways (BEACON – 1964).

CONTORTS was the origin of Univac's subsequent RT operating systems for 494 (STARS) and later converted to the 1100 Series (RTOS).