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Reference / Glossary

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Cross References
halfword n. A contiguous sequence of bits or characters that constitutes half a computer word and can be addressed as a unit.
hand off v. To dispose of an unwanted task, piece of business or requirement by maneuvering it into the in-box of an unsuspecting or accommodating colleague.
handheld device n. Any computing device that can be held in the hand. Handheld devices include palm-sized PCs and personal digital assistants (PDAs).
hands-on n. Physical access to equipment.
hard disk n. A mass storage medium for computers that is typically available as a fixed disk (such as the disks used in the system units of personal computers or in drives that are external to a personal computer) or a removable cartridge.
hard drive n. The correct term is "hard disk drive." See drive and hard disk.
hardcopy 1. n. A permanent copy of a display image generated on an output device such as a printer or plotter, and which can be carried away. 2. n. A printed copy of machine output in a visually readable form; for example, printed reports, listings, documents, and summaries.
hardstop n. The nominal absolute latest moment at which a meeting must end or a departure take place (as in: "I have a hardstop at 2.").
hardwire v. To code as a constant value something that would normally be a changeable parameter.
hear v. To understand and sympathize with, and invariably followed by "but" (as in: "I hear you but I can't give you any help on that problem.").
heartbeat n. In software products, a signal that one entity sends to another to convey that it is still active.
help 1. n. Something provided by headquarters staff, especially in times of great difficulty. Often this term is used in conjunction with the observation that "If we don't improve the situation, we'll get more Help than we can imagine." 2. n. A choice that gives a user access to helpful information about objects, choices, tasks, and products. A Help choice can appear on a menu bar or as a push button.
hexadecimal 1. adj. Pertaining to a selection, choice, or condition that has 16 possible different values or states. 2. adj. Pertaining to a fixed-radix numeration system, with radix of 16. 3. adj. Pertaining to a system of numbers to the base 16; hexadecimal digits range from 0 through 9 and A through F, where A represents 10 and F represents 15.
high-availability cluster multiprocessing (HACMP) n. An application service that enables up to eight RS/6000 servers to access the same data in parallel. This optimizes application execution and scalability and protects against unplanned outages and server downtime.
highlighting v. Emphasizing a display element or segment by modifying its visual attributes
hiragana n. One of the two common Japanese phonetic alphabets (the other is katakana). In hiragana, each character is represented by 1 byte.
home page n. The initial Web page that is returned by a Web site when a user specifies the uniform resource locator (URL) for the Web site. For example, if a user specifies the URL for the IBM Web site, which is, the Web page that is returned is the IBM home page. Essentially, the home page is the entry point for accessing the contents of the Web site. The home page may sometimes be called the "welcome page" or the "front page."
home position n. The position to which a cursor normally returns.
hook n. A location in a computer program where an instruction is inserted for invoking a particular function
host 1. n. A computer that is connected to a network (such as the Internet or an SNA network) and provides an access point to that network. Also, depending on the environment, the host may provide centralized control of the network. The host can be a client, a server, or both a client and a server simultaneously. 2. n. In a Tivoli environment, a computer that serves as a managed node for a profile distribution. 3. v. To provide the software and services for managing a Web site.
host ID n. In the Internet suite of protocols, that part of the IP address that defines the host system on the network. The length of the host ID depends on the type of network or network class (A, B, or C).
host name n. In the Internet suite of protocols, the name given to a computer. Sometimes, "host name" is used to mean fully qualified domain name; other times, it is used to mean the most specific subname of a fully qualified domain name. For example, if is the fully qualified domain name, either of the following may be considered the host name: mycomputer
host node 1. n. A node at which a host computer is located. 2. n. A node that provides an application programming interface (API) and a common application interface.
host processor 1. n. A processor that controls all or part of a user application network. 2. n. In a network, the processing unit in which the data communication access method resides.
hot disconnect n. A slang term for the process of breaking the connection between a computer and its network without shutting down the communication software that supports the connection. For example, a hot disconnect occurs when a user removes a laptop computer from its docking station without shutting down the system. A hot disconnect is possible only with hardware that is Plug and Play compatible.
hot key 1. n. The key combination used to change from one session to another on the workstation. 2. v. To jump, or hot key, from a host session to an application on the workstation, or from the workstation to the host session.
hover help n. Help information that appears when a mouse cursor moves (or "hovers") over a particular part of a computer screen for a predefined amount of time.
how hard would it be? adv. A plaintive litany used when venturing suggestions for changes almost always in conjunction with some preposterously difficult proposal which to the requester seems simple (as in: "Say, how hard would it be to make that fix?").
hub n. In a network, a point at which circuits are either connected or switched. For example, in a star network, the hub is the central node; in a star/ring network, it is the location of wiring concentrators.
hung adj. Not responding to requests.
hypertext n. A way of presenting information online with connections (called hypertext links) between one piece of information and another.
Hypertext Markup Language (HTML) n. A markup language that conforms to the SGML standard and was designed primarily to support the online display of textual and graphical information that includes hypertext links.
Hypertext Transfer Protocol (HTTP) n. In the Internet suite of protocols, the protocol that is used to transfer and display hypertext documents.
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