jan 1, 1967 - D200

Description:

Aviation Computer
The first computer to be fashioned out of MOS-LSI chips was something called the D200, created in 1967 by Autonetics, a division of North American Aviation, located in Anaheim, Calif.
24-bit general-purpose computer was designed for aviation and navigation. Its central processing unit was built from 24 MOS chips and benefitted from a design technique called four-phase logic, which used four separate clock signals, each with a different on-off pattern, or phase, to drive changes in the states of the transistors, allowing the circuitry to be substantially simplified. Weighing only a few kilograms, the computer was used for guidance on the Poseidon submarine-launched ballistic missile and for fuel management on the B-1 bomber. It was even considered for the space shuttle.

possibley first microprocessor if you allow for multiple chips
https://spectrum.ieee.org/tech-history/silicon-revolution/the-surprising-story-of-the-first-microprocessors

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