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Charles Babbage first proposed the Analytical Engine, which uses punch cards as memory and a way to program the computer.

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Gustav Tauschek developed drum memory in 1932.

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Jan Rajchman began his work on developing the Selectron tube that was capable of storing 256 bits. Because of the popularity of magnetic core memory at the time, the Selectron tube was never put into mass production.

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John Schmidt designed a 64-bit MOS p-channel Static RAM while at Fairchild in 1964.

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Kenneth Olsen was issued U.S. patent on December 15, 1964, for magnetic core memory.

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On June 4, 1968, Dr. Robert Dennard was granted a U.S. patent, describing a one-transistor DRAM cell.

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Intel released its first product, the 3101 Schottky TTL bipolar 64-bit static random-access memory (SRAM) in 1969.

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DDR4 SDRAM began being sold in September 2014.