The Harvard Mark IV was an electronic stored-program computer built by Harvard University under the supervision of Howard Aiken for the United States Air Force. The computer was finished being built in 1952. It stayed at Harvard, where the Air Force used it extensively.
The Mark IV was all electronic. The Mark IV used magnetic drum and had 200 registers of ferrite magnetic core memory (one of the first computers to do so). It separated the storage of data and instructions in what is known as the Harvard architecture.
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