Magnetic Computer Memory

By johncburns1

  • Tabulating Machine

    Herman Hollerith's tabulating machine built to help process data in the 1890 US Census. It used punch cards to store data

  • Manchester "Baby" Mark I

    First fully electronic memory using the Williams-Kilburn tube.

  • Magnetic Core Memory

    Jay Forrester thinks of coincidental current technique for magnetic core memory. Becomes the first high-speed RAM.

  • Drum Memory

    US Navy and ERA made the Atlas in 1950 to try and increase the US's code breaking abilities. Atlas used magnetic drum memory, one of the first stored-program computers.

  • NPL Pilot ACE

    The Pilot ACE [ideas by Alan Turing] is constructed by British. Meant to be a multipurpose machine.

  • UNIVAC I Tape Drive

    UNIVERSO tape drive for the UNIVAC I computer. This was the first tape storage device for commercial computers.

  • IBM 726 Magnetic Tape

    Early high-speed magnetic tape system for electronic computers

  • Magnetic Core Memory Implemented

    Whirlwind core memory by MIT is first computer to implement Forrester's magnetic core memory

  • RAMAC

    IBM's RAMAC uses newly discovered magnetic disk storage to create the world's first hard-disk-drive

  • Magnetostrictive Delay Lines

    Ferranti Sirius was a small computer that could handle one language and its main memory was a magnetostrictive delay line.

  • Virtual Memory

    Atlas computer project under Tom Kilburn uses virtual memory for the first time.

  • CRAM

    CRAM introduced as a method of magnetic storage.

  • IBM Disk Cartridge and Data Cell Drive

    IBM makes the first disk cartridge (differs from a disk drive) and the data cell drive using magnetic strips is created

  • Signetics RAM

    Signetic makes 8-bit RAM that is one of first uses of dedicated semiconductor memory devices in a computer

  • Minnow Floppy Disk

    IBM begins to develop the Minnow read-only floppy disk

  • IBM starts to use semiconductor memory

    IBM builds first computer [System 370 Model 145 mainframe computer] with all semiconductor memory.

  • Intel 1103 Memory Chip

    Marked the decline of magnetic core memory and replaced it with DRAM integrated circuits as main memory in computers.

  • 3850 Mass Storage System

    Released as an alternative to manual tape reel. Used magnetic tape rolled up into honeycomb shapes

  • DRAM Manufactured

    Japan begins to commercially sell DRAM chips and becomes a major player in the world DRAM market. DRAM becomes first major market chip.

  • Laser Disks and ROM Chips

    Technology starts to get more fun for everyday use

  • Seagate ST506 hard disk drive

    First hard disk drive for microcomputers (magnetic)

  • CD-ROM

    Sony and Philips develop the CD-ROM

  • Fujio Masuoka invents flash memory

    While working for Toshiba, flash memory invented by Fujio Masuoka