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Electronic File Storage

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Erin Giblin

on 28 November 2012

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Transcript of Electronic File Storage

Hard Drive (1956) "The first computer with a hard disk driveas standard was the IBM 350 Disk File, introduced in 1956 with the IBM 305 computer...The storage capacity of the 305's 50 two-foot diameter disks was 5 megabytes of data" ("The history of (computer) storage,"n.d.). 8" Floppy Drive (1971) "a read-only, 8-inch (20 cm) floppy they called the "memory disk", holding 80 kilobytes in 1971" ("The history of (computer) storage,"n.d.). CD/CD-ROM
(1980/1984) "The 120mm discs (CD) can hold 74 minutes of audio, and versions holding 80 or even 90 minutes have been introduced" ("The history of (computer) storage,"n.d.).
"The standard CD-ROM can hold approximately 650-700 megabytes of data, although data compression technology allows larger capacities" ("The history of (computer) storage,"n.d.). 3.5" Floppy Disk "They were originally offered in a 360 KB single-sided and 720 KB double-sided double-density format. A newer "high-density" format, displayed as "HD" on the disks themselves and storing 1440 KB of data, was introduced in the mid-80s. IBM used it on their PS/2 series introduced in 1987" ("The history of (computer) storage,"n.d.). Compact Flash (1994) "CompactFlash (CF) is a data storage device that uses the flash memory in a standardized enclosure. On a CF there is the memory as well as the controller (the electronic that writes and read the memory)" ("The history of (computer) storage,"n.d.). DVD (1995) "DVD is essentially a bigger, faster CD that can hold cinema-like video, better-than-CD audio, still photos, and computer data" ("The history of (computer) storage,"n.d.). USB/Flash (2001) "Flash drives are active only when powered by a USB computer connection, and require no other external power source or battery power source; key drives are run off the limited supply afforded by the USB connection (5V)" ("The history of (computer) storage,"n.d.). SD Card (2001) "Standard SD cards measure 32 mm by 24 mm by 2.1 mm. Typically, an SD card is used as storage media for a portable device, in a form that can easily be removed for access by a PC" (The history of (computer) storage," n.d.). Blue-ray (2003) "One single-layer Blu-ray Disc (BD) can hold about 25 GB or over two hours of HD video plus audio, and the dual-layer disc can hold approximately 50 GB" ("The history of (computer) storage,"n.d.). Present
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