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10 Cards in this Set
- Front
- Back
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What is a computer system?
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the computer and other support devices that work together to receive and process information to provide output to the user
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Where is the CPU located and what are the 3 units that work together?
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The CPU is located inside the computer body (computer chips). 3 units are 1. control unit, 2. arithmetic logic unit and 3. memory unit
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What is random access memory (RAM)?
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Temporary memory which holds new data; available only while the computer is ON. RAM information is lost when computer is turned off, loast of power or surge occurs
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What is read-only memory (ROM)?
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Permanent internal memory inside the system, inaccessible by the user, used to store instructions that are installed or programmed by the manufaturer.
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Why are peripheral devices important?
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To be able to input info., output the information for the user, and store info. for later use.
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What are input devices? Give examples
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devices which allow the input of data into the computer; i.e mice, keyboard, scanner, digital camera, graphic tablet etc.
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What are storage devices? Give examples
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devices which allow storage of data for later use (internal and external), i.e floppy disk, hard drive, zip disks, CD and CD-ROM/R/RW etc.
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What do Universal Serial Bus (USB) ports do?
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provide an easy, universal way to connect an array of devices and provide faster transfer of information to printers, scanners, digital cameras, stroage drives, modems, speakers and other devices
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What is a personal digital assistant (PDA)?
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small portable tools which allow the user to input handwritten notes on a small screen using a special pen or tiny keyboard
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How is processor speed expressed?
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In megaherts MHz (1 million cycles/sec.) or gigahertz GHz (1 billion cycles/sec.)
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