Computer memory history

Updated: 05/05/2017 by Computer Hope
Computer hard drive history
Year Event
1837 Charles Babbage first purposed the Analytical Engine, which was the first computer to use punch cards as memory and a way to program the computer.
1932 Gustav Tauschek develops drum memory.
1942 John Atanasoff successfully tests the Atanasoff-Berry Computer (ABC) which was the first computer to use regenerative capacitor drum memory.
1946 Freddie Williams applies for a patent on his cathode-ray tube (CRT) storing device on December 11, 1946. The device that later became known as the Williams tube or more appropriately the Williams-Kilburn tube. The tube stored only stored 128 40-bit words and is the first practical form of random-access memory.
1946 Jan Rajchman begins 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.
1947 Freddie Williams memory system known as the Williams-Kilburn tube is now in working order.
1947 Frederick Viehe files a series of some of the first patents relating to magnetic-core memory. Others who helped with the development of magnetic-core memory and magnetic drum memory include An Wang, Ken Olsen and Jay Forrester.
1949 Jay Forrester and other researchers comes up with the idea of using magnetic-core memory in the Whirlwind computer.
1950 The United States Government receives the UNIVAC 1101 or ERA 1101. This computer is considered to be the first computer that was capable of storing and running a program from memory.
1951 Jay Forrester applies for a patent for magnetic-core memory, an early type of random access memory (RAM) May 11, 1951.
1952 In his master's thesis, Dudley Allen Buck describes Ferroelectric RAM (FeRAM) that was not developed until the 1980's and early 1990's.
1953 In July 1953 a core memory expansion is added to the ENIAC.
1955 Konrad Zuse completes the Z22, the seventh computer model and first computer that used magnetic storage memory.
1955 MIT introduces the Whirlwind machine on March 8, 1955, a revolutionary computer that was the first digital computer with magnetic core RAM.
1955 An Wang is issued U.S. patent #2,708,722 on May 17, 1955 for then invention of the magnetic "Pulse Transfer Controlling Device", which made magnetic core memory a reality.
1955 Bell Labs introduces its first transistor computer. Transistors are faster, smaller, and create less heat than traditional vacuum tubs, making these computers more reliable and efficient.
1964 John Schmidt designs a 64-bit MOS p-channel Static RAM while at Fairchild.
1964 Kenneth Olsen is issued U.S. patent #3,161,861 on December 15, 1964 for Magnetic core memory.
1968 On June 4, 1968 Dr. Robert Dennard at the IBM T.J. Watson Research center is granted U.S. patent #3,387,286 describing a one-transistor DRAM cell. DRAM will later replace magnetic core memory in computers.
1969 Charles Sie publishes a dissertation at Iowa State University where he described and demonstrated Phase-change memory (PRAM). Although PRAM has still never been commercially practical, it is still being developed at companies like Samsung.
1969 Intel releases its first product, the 3101 Schottky TTL bipolar 64-bit static random-access memory (SRAM). In the same year Intel released the 3301 Schottky bipolar 1024-bit read-only memory (ROM).
1970 Intel releases its first commercially available DRAM, the Intel 1103 in October 1970. Capable of storing 1024 bytes or 1 KB of memory.
1971 While at Intel, Dov Frohman invents and patents (#3,660,819) the EPROM.
1974 While at Intel, Federico Faggin at Intel is granted patent #3,821,715 on June 28, 1974 that describes a memory system for a multichip digital computer.
1978 George Perlegos with Intel develops the Intel 2816, the first EEPROM.
1983 Wang Laboratories creates the single in-line memory module (SIMM).
1993 Samsung introduces the KM48SL2000 synchronous DRAM (SDRAM) and quickly becomes an industry standard.
1984 Fujio Masuoka invents flash memory.
1996 DDR SDRAM begins being sold.
1999 RDRAM becomes available for computers.
2003 DDR2 SDRAM begins being sold.
2003 XDR DRAM begins being sold.
2007 DDR3 SDRAM begins being sold June 2007.

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