Anthony J. Nowakowski, Ph.D.
Computer Literacy
Anthony J. Nowakowski, Ph.D.
Computer Literacy
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Anthony J. Nowakowski, Ph.D.
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.
Anthony J. Nowakowski, Ph.D.
Computer Literacy
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,
Anthony J. Nowakowski, Ph.D.
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)
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Uses for Computers
Anthony J. Nowakowski, Ph.D.
GENERAL PURPOSE
Word processing
Spreadsheets
Databases
Graphics
Communication
Education
Entertainment
SPECIAL PURPOSE
Watches
Telephones
Appliances
Traffic Signals
Automobiles
Airplanes
Instruments
Computer Literacy
Anthony J. Nowakowski, Ph.D.
Computer Literacy
OperatingSystems
Anthony J. Nowakowski, Ph.D.
MS-DOSWindows 95 Windows NT
SYSTEM 8VAX/VMSUNIX
Computer Literacy
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.
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Hardware
Windows95
OS
Application
Word
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Hardware
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Computer Components
Input
Output
Processor
Memory
SecondaryStorage
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Computer Components
Input
Output
Processor
Memory
SecondaryStorage
Anthony J. Nowakowski, Ph.D.
Antenna
CD player
Turntable
Speakers Headphones
Amplifier
Tape deck
Computer Literacy
Stereo System
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Computer SystemKeyboard Mouse
Floppydisk
Hard drive
Monitor
Tapebackup
CPU
CD-ROM/DVDPrinter CD-R/CD-W
Anthony J. Nowakowski, Ph.D.
Computer Literacy
Serial vs.
Parallel
Connections
Anthony J. Nowakowski, Ph.D.
Parallel 0
1
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
0
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Parallel
Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Parallel 0
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RECEI VER
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Computer Literacy
Anthony J. Nowakowski, Ph.D.
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
RECEI VER
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Serial
Computer Literacy
Anthony J. Nowakowski, Ph.D.
Serial
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
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Computer Literacy
Anthony J. Nowakowski, Ph.D.
Serial
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
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SENDER
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
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0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
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SENDER0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
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SENDER0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
1
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
1
0
1
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
1
0
0
1
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
1
0
1
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
1
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Serial
RECEI VER
SENDER
0
1
0
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Computer Literacy
A is represented by 01000001A is represented by 01000001A is represented by 01000001A is represented by 01000001
Anthony J. Nowakowski, Ph.D.
Computer Literacy
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