Anthony J. Nowakowski, Ph.D. Computer Literacy Computer Literacy Brought to you by

Anthony J. Nowakowski, Ph.D.

Computer Literacy


Computer Literacy

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Computer Literacy

“The first electronic digital computer built in the United States, ENIAC, was unveiled at the University of Penn-sylvania in 1946. It weighed 30 tons, filled the space of a two-car garage, and contained 18,000 vacuum tubes, which failed on average at the rate of one every seven minutes. It cost half a million dollars in 1946 prices.


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Today, the same amount of computing power is contained in a pea-size silicon chip. Almost any home computer costing as little as $100 can outper-form ENIAC. Put another way, if the automobile and airplane businesses had developed like the computer business,


Computer Literacy

a Rolls Royce would cost $2.75 and run for 3 million miles on one gallon of gas. And a Boeing 767 would cost just $500 and circle the globe in twenty minutes on five gallons of gas.”

Tom Forester, ed. The Information Technology Revolution

(Cambridge, MA: MIT Press, 1985)


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Uses for Computers


GENERAL PURPOSE

Word processing

Spreadsheets

Databases

Graphics

Communication

Education

Entertainment

SPECIAL PURPOSE

Watches

Telephones

Appliances

Traffic Signals

Automobiles

Airplanes

Instruments

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Computer Literacy

OperatingSystems


MS-DOSWindows 95 Windows NT

SYSTEM 8VAX/VMSUNIX

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Functions of an Operating System Provide an interface between the user and the

computer Manage data and files and provide security to multiple

users Execute other computer programs Manage peripheral devices such as printers, modems,

disk drives, scanners, etc.


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Hardware

Windows95

OS

Application

Word


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Hardware


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Computer Components

Input

Output

Processor

Memory

SecondaryStorage


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Computer Components

Input

Output

Processor

Memory

SecondaryStorage


Antenna

CD player

Turntable

Speakers Headphones

Amplifier

Tape deck

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Stereo System


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Computer SystemKeyboard Mouse

Floppydisk

Hard drive

Monitor

Tapebackup

CPU

CD-ROM/DVDPrinter CD-R/CD-W


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Serial vs.

Parallel

Connections


Parallel 0

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A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001


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Parallel

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Parallel 0

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Serial


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Computer Literacy

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Anthony J. Nowakowski, Ph.D. Computer Literacy Computer Literacy Brought to you by