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The History of Computer Datas Storage

May 30, 2018

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Marleydis Soto
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    THE H ISTO RY OF COMPUT ERDATAS STO RAGE

    LESNER VEGA GOMEZ

    LUIS ALBERTO REYES

    AURY DIAZ ANICHIARICO

    MARLEYDIS SOTO TIRADO

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    Nowadays we are used to having hundreds of gigabytes of storage capacity in our

    computers. Even tiny MP3 players and other handheld devices usually have several

    gigabytes of storage. This was pure science fiction only a few decades ago. For example,

    the first hard disk drive to have gigabyte capacity was as big as a refrigerator, and that

    was in 1980, Not so long ago.

    stores a lot of monitoring data every single day, and considering how much we take

    todays storage capacity for granted, its interesting to look back and get things in

    perspective. Here is a look back at some interesting storage devices from the early

    computer era.

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    T HE SELECTRON T UB E

    The Selectron tube had a capacity of 256 to 4096 bits (32 to 512 bytes).

    The 4096-bit Selectron was 10 inches long and 3 inches wide. Originally

    developed in 1946, the memory storage device proved expensive and suffered

    from production problems, so it never became a success.

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    PUNCH CARDS

    Early computers often used punch cards

    for input both of programs and data.

    Punch cards were in common use until

    the mid-1970s. It should be noted that

    the use of punch cards predates

    computers. They were used as early as

    1725 in the textile industry (for

    controlling mechanized textile looms).

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    PUNCHED TAPE

    Same as with punch cards, punched tape

    was originally pioneered by the textile

    industry for use with mechanized looms.

    For computers, punch tape could be used

    for data input but also as a medium to

    output data. Each row on the tape

    represented one character.

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    THE HARD DISK DRIVE

    The first hard disk drive was the IBM

    Model 350 Disk File that came with the

    IBM 305 RAMAC computer in 1956.

    It had 50 24-inch discs with a total

    storage capacity of 5 million characters

    (just under 5 MB).

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    THE LASERDISC

    We mention it here mainly because it was the

    precursor to the CD-ROM and other optical

    storage solutions. It was mainly used for movies.

    The first commercially available laserdisc system was

    available on the market late in 1978 (then called

    Laser Videodisc and the more funkily branded

    Disco Vision) and were 11.81 inches (30 cm) in

    diameter. The discs could have up to 60 minutes of

    audio/video on each side. The first laserdiscs had

    entirely analog content. The basic technology behind

    laserdiscs was invented all the way back in 1958.

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    THE FLOPPY DISC

    The diskette, or floppy disk (named so

    because they were flexible), was invented by

    IBM and in common use from the mid-1970s to the late 1990s. The first floppy

    disks were 8 inches, and later in came 5.25

    and 3.5-inch formats. The first floppy disk,

    introduced in 1971, had a capacity of 79.7

    kB, and was read-only. A read-writeversion came a year later.

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    MAGNETIC TAPE

    Magnetic tape was first used for data

    storage in 1951. The tape device was

    called UNISERVO and was the main

    I/O device on the UNIVAC I

    computer. The effective transfer rate for

    the UNISERVO was about 7,200

    characters per second. The tapes were

    metal and 1200 feet long (365 meters)

    and therefore very heavy.

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    COMPACT DISK

    Compact Disc (also known as a CD) is an

    optical disc used to store digital data. It

    was originally developed to store sound

    recordings exclusively, but later it also

    allowed the preservation of other types of

    data. Audio CDs have been commercially

    available since October 1982. In 2010,

    they remain the standard physical storage

    medium for audio.

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    FLOPPY DISK

    A floppy disk is a data storage

    medium that is composed of a disk of

    thin, flexible ("floppy") magnetic

    storage medium encased in a square or

    rectangular plastic shell

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    DVD

    DVD, also known as Digital Video Disc

    or Digital Versatile Disc, is an optical disc

    storage media format, and was invented and

    developed by Philips, Sony, TOSHIBA,

    and TimeWarner in 1995. Its main uses

    are video and data storage. DVDs are of

    the same dimensions as compact discs

    (CDs), but store more than six times as

    much data.

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    FLASHMEMORY

    Flash memory is a non-volatile computer

    storage technology that can be electrically

    erased and reprogrammed. It is primarily

    used in memory cards and USB flash

    drives for general storage and transfer of

    data between computers and other digital

    products.

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    THANKS