A Brief History of Computers

Third Generation

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Third Generation

Transistors were miniaturized and placed on

silicon chips, called semiconductors

First computers to facilitate user interaction

Made machines cheaper and smaller

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1970-71: The First PC

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Significant Events

1970: Development of UNIX operating system begun.

1972: Programming language C developed at The Bell

Laboratories in the USA .

1972: The first international connections to ARPANET are

established.

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Significant Events

1971: The Intel 4004, the first commercially available

microprocessor, is released.

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1972: Intel 8008

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1973: Xerox Alto

First workstation to use a mouse

1974: The Altair 8800

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1974: The Altair 8800

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1974: The Altair 8800

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1976: Apple 1

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“Typewriter in a box”

First Popular PCs

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Apple IITandy TRS-80

1977

1982Commodore 64

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1981: IBM PC

4.77 MHz Intel 8088 processor

MS DOS operating system

The First IBM PC

August, 1981

16K Memory

Dual floppy drives

$1,565 (about $4,000 today)

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1981: First Portable Computer

The Osborne I: 24 lbs

Significant Events

1973: Programming language Prolog developed

1973: Ethernet developed

1975: USA Formation of Microsoft

1976: First laser printer introduced by IBM – the IBM 3800

1983: Compaq introduced first clone

1984: Apple Macintosh17

Significant Events

1984: IBM AT (286 chip, $4,000)

1985: Intel 386 chip (16 MHz)

1989: Intel 486 chip

1993: Intel Pentium

2006: Dual Core Processing

2007: Quad Core Processing18

End of Class!!

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