Chapter 4 Definitions

Chapter 4 Definitions - Chapter 4 Page 69: Mainframes the...

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Chapter 4 Page 69: Mainframes – the first digital computing machines used in business and government. Page 70: Microcomputers SpaceWar – first video game. Page 72: Hardware – electronic components and related gadgetry that input, process, output, store, and communicate data according to instructions encoded in computer programs or software. E-cycling Page 73: Input hardware – hardware devices that attach to a computer; includes keyboards, mouse, document scanners, and barcode (Universal Product Code) scanners. Central processing unit (CPU) – the CPU selects instructions, processes them, performs arithmetic and logical comparisons, and stores results of operations in memory. Page 74: Main memory – a set of cells in which each cell holds a byte of data or instruction; each cell has an address, and the CPU uses the addresses to identify particular data items. Special function cards – cards that can be added to the computer to augment the computer’s basic capabilities. Output hardware – hardware that displays the results of the computer’s processing. Consists of video displays, printers, audio speakers, overhead projectors, and other special-purpose devices, such as large flatbed plotters. Storage hardware – hardware that saves data and programs. Magnetic disk is by far the most common storage device, although optical disks, such as CDs and DVDs, also are popular. Binary digits – the means by which computers represent data; also called bits . A binary digit is either a zero or a one.
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Bit – the means by which computers represent data; also called binary digit. A bit is either a zero or a one. Page 75: Byte – (1) a character of data; (2) an 8-bit chunk Kilobyte (K) – 1024 bytes Megabyte (MB) – 1024 KB Gigabyte (GB) – 1024 MB Terabyte (TB) – 1024 GB Page 76: Data channel – means by which the CPU reads instructions and data from main memory and writes data to main memory. Bus
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This note was uploaded on 03/22/2010 for the course COMP SCI 1032 taught by Professor Goldstein during the Winter '10 term at UWO.

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Chapter 4 Definitions - Chapter 4 Page 69: Mainframes the...

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