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<br />ATTACHMENT A, PAGE 4 <br /> <br />1) <br /> <br />MATRIX PRINTER - A printer in which each character is <br />represented by a pattern of dots. <br /> <br />BAND PRINTER - A printing device with a rotating metal band <br />with multiple alphanumeric sets that imprints by striking of a <br />hammer. <br /> <br />2) <br /> <br />3) <br /> <br />TYPEWRITER PRINTER - A device that produces letter quality <br />type, generally used in word processing systems. <br /> <br />DRUM PRINTER - A line printer in which the type are mounted <br />on a rotating drum that contains a full character set for each <br />printing position. <br /> <br />4) <br /> <br />5) <br /> <br />THERMAL PRINTER - A non-impact printer where an image <br />forms on specially treated paper by a heat process, normally with <br />a matrix comb. <br /> <br />6) <br /> <br />LASER PRINTER - A non-impact printer where an image is <br />transferred to ordinary paper by the heat of a laser and special <br />heat sensitive inks. <br /> <br />b) <br /> <br />CATHODE RAY TUBE DISPLAY (VIDEO) - A device that presents <br />data in visual form by means of controlled electron beams (similarly to <br />a television set). <br /> <br />1) <br /> <br />CATHODE RAY TUBE (CRT) - A cathode ray tube display which <br />includes a keyboard. <br /> <br />4) <br /> <br />CONTROL UNITS - Devices that control other devices depending upon <br />hardware and software designs. <br /> <br />a} <br /> <br />DATA BUS - A set of logic or lines for the high speed transmission of <br />data with a computer system. <br /> <br />E. <br /> <br />BYTE - A character or letter presented in the computer as a sequence of binary <br />digits. <br /> <br />I} <br /> <br />KILOBYTE (KB) - Designation for approximately one thousand bytes <br />(actually 1,024 bytes). <br /> <br />MEGABYTE (MB) - Designation for approximately one million bytes <br />(actually 1,048,576 bytes). <br /> <br />2) <br /> <br />F. <br /> <br />HARDW ARE MAINTENANCE - Any activity, such as tests, measurements, <br />replacements, adjustments, and repairs, intended to eliminate faults to keep a <br />functional unit in a specified state. <br /> <br />1) <br /> <br />PREVENTIVE MAINTENANCE - Scheduled hardware maintenance the <br />purpose of which is to evaluate and test the mechanical, electrical, and <br />electronic functions and components of hardware to identify, correct, <br />adjust, repair, and/or prevent malfunctions. <br />