Glossary
HCU Host Channel Unit. A component of the
hardware Physical components (mechanical, magnetic, electronic, etc.) of a system, as opposed to programs, procedures, rules, and associated documentation. The hardware is operated by software and firmware.
header page Page printed at the beginning of a job that provides information about the print job, such as the name of the document and the job sender.
hexadecimal Numbering system with a base of 16. In this system, 10 through 15 represented by A through F, respectively.
hierarchy Relative priority assigned to arithmetic or logical operations that must be performed.
highlight color Printing with black plus one other color in a single pass. In models 4850, 4890, and 92C, a range of shades and tints is printed by varying the percentage of black dots, color dots, and white space between the dots within a given square area of the page.
host Computer accessed by users which serves as a source of high- speed data processing for workstations with less computer power. Commonly referred to as mainframe.
host interface Connection between network and host computer.
HSB A printing industry standard color definition model in which all colors are defined in terms of values for hue, saturation, and brightness. Refer to color definition model.
identifier (id) Characters used to identify or name data and possibly to indicate certain properties of that data.
image area Area on a physical page that may contain text or graphics.
implementation Process of installing system hardware and software. Also the process of converting a design into an actual working system.
impressions per The number of pages (one side) a printer can print during the minute (ipm) space of one minute. Used interchangeably with pages per
minute (ppm).
initialize 1. To prepare the magnetic surface of a blank diskette so that it can accept data.
2.To set all information in a computer system to its starting values (usually the first step is accomplished when a program is booted).
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