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Discovering Computers Chapter 1: Introduction to Computers Computer Literacy Having knowledge and understanding of computers and their uses. A World of Computers Computers are everywhere: at work, at school and at home Communication Text Messages, Pictures, Diagrams, Music, Videos Instant Access to Information National News, weather reports, maps, credit reports, educational material Manage Daily Activities Balance checkbook, Letters, Presentations, navigation systems Leisure Time Activities Play games, listen to music, read books, plan vacations What is a COMPUTER? An electronic device, operating under the control of instructions stored in its own memory unit, that can accept data, manipulate data according to specific rules, produce information from the processing, and store the results for future use. Hardware in a Computing Environment Input Devices Output Devices System Unit Storage Devices storage media Communication Devices Advantages of Using A Computer Speed Reliability Consistency Storage Communications Disadvantages of computer Violation of Privacy Impact on Labor Force Health Risk Impact on Environment Network Collection of computers and devices connected together Share resources such as hardware, software, data Server/Client The Internet World’s largest Network Millions of computers Over 360 million users World wide Reasons for using Sending messages (e- mail) Accessing information Shopping Meeting or conversing Entertainment Games Magazines Vacation planning guides The World Wide Web One segment of the Internet Contains billions of documents Web pages Web site Collection of related web pages Viewed using Web Browser IE –Netscape Computer Software Software/program – series of instructions that tell computer what to do GUI – Graphics User Interface System Software – control operations of computer and devices operating system – coordinates activities among computer hardware utility programs – maintain devices and programs Application Software – makes user more productive or assists with personal tasks Categories of Computers Embedded Computers Consumer Electronics, Automobiles, Office Machines, Home Automation Personal Computers Desktop Mobile Computers : Notebook/laptop Tablet PC (digital pen) Mobile Devices handheld – industry-specific PDAs -organizers smart phones –internet enabled phone with PDA capabilities smart watches – internet enabled watch Game Consoles Nintendo’s Game Boy Sony’s Playstation Categories of Computers (cont) Servers Controls resources on a network Centralized storage area Mainframes handles hundreds of thousands connected users simultaneously (DELTA) Supercomputer fastest most powerful (weather forecasting, nuclear energy research) Register to View Book Resources Discovering Computers 2007 by Shelly Cashman and Vermatt http://www.scsite.com/dc2007 New User Registration http://login.course.com
"Introduction To Computers"