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Chapter 1
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What is computer fluency? The knowledge possessed by people who are able to navigate the digital world successfully NOT THIS
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What is a computer? A machine that, under a program’s direction, performs four basic operations: input, processing, output, and storage
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What is a program? A list of instructions that tells a computer how to perform the four basic operations
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What is input? Data entered into the computer system for processing Electrical impulses representing words, numbers, images, or sounds
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What is processing? Performing arithmetic or comparison (logical) operations on the data 4+16=20 728>546 Arithmetic Logic
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What is output? Showing the results of the processing operation in a way people can understand
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What is storage? Saving the data or output so that it can be used again later
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What are the computer’s physical components? HARDWARE Input devices- Enable users to put data into the computer for processing Processing circuitry- Components located in the system’s case that transform data into information Output devices- Peripherals that show the results of processing Storage devices- Used to hold all the programs and data that the computer uses Communication Devices- Used to move data between computers
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What are input devices? Keyboard Mouse- pointing device Microphone- speech-recognition
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What are processing devices? Motherboard Central Processing Unit- CPU Random Access Memory- RAM Expansion card
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What are output devices? Monitor Printer Speakers
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What are storage devices ? Hard Drive Floppy Disk Drive Zip Drive CD / DVD Drive Jazz Drive Tape Drive Micro Drive
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What are communications devices ? Modem Network Interface Card- NIC
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What are the different types of computers? Desktop- PC, Microcomputer Notebook- Laptop Workstation Personal Digital Assistant- PDA, Handheld, Pocket PC Supercomputer Mainframe Minicomputer Server
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What is software? Programs that give the computer’s hardware its step-by-step instructions
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What are the different types of software? System software- All programs that help the computer function properly Application software- All the programs you use to perform a task such as writing a letter or browsing the World Wide Web System software Application software
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What is an operating system? System software that... Coordinates the various functions of the computer’s hardware Provide support for running application software Provide utility programs for optimizing computer performance
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What are the types of operating systems? Command-line interface- Users type instructions at the keyboard, one line at a time. Examples MS-DOS, PC DOS, UNIX Graphical user interface (GUI)- Users choose items from menus by using a pointing device to click on icons which represent resources and commands. Examples Windows, Mac OS
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Command-line interface
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Graphical user interface (GUI)-
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What is a software suite? A collection of full featured standalone programs that usually share a common command structure and have similar interfaces MS WORD MS EXCEL MS POWERPOINT MS ACCESS MS FRONT PAGE
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What is the internet? A world-spanning computer network
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What are internet services? Standards and software that make internet resources, such as Web pages, files and electronic mail available to users Electronic mail- (e-mail) World Wide Web- (WWW) File Transfer Protocol- (FTP) Instant messaging Electronic commerce- (e-commerce)
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The End
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