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 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 Operating Systems

Anthony J. Nowakowski, Ph.D. MS-DOS Windows 95 Windows NT SYSTEM 8 VAX/VMS UNIX Computer Literacy Functions of an Operating System 4 4 Provide an interface between the user and the computer 4 4 Manage data and files and provide security to multiple users 4 4 Execute other computer programs 4 4 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 Secondary Storage

Anthony J. Nowakowski, Ph.D. Computer Literacy Computer Components Input Output Processor Memory Secondary Storage

Anthony J. Nowakowski, Ph.D. Antenna CD player Turntable SpeakersHeadphones Amplifier Tape deck Computer Literacy Stereo System

Anthony J. Nowakowski, Ph.D. Computer Literacy Computer System KeyboardMouse Floppy disk Hard drive Monitor Tape backup CPU CD-ROM/DVD Printer CD-R/CD-W

Anthony J. Nowakowski, Ph.D. Computer Literacy Serial vs. Parallel Connections

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Anthony J. Nowakowski, Ph.D. A is represented by RECEIVERRECEIVER SENDERSENDER Serial Computer Literacy

Anthony J. Nowakowski, Ph.D. Serial A is represented by RECEIVERRECEIVER SENDERSENDER Computer Literacy

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Anthony J. Nowakowski, Ph.D. Computer Literacy This section is finished