B

Backbone. (1)

A set of nodes and their interconnecting links providing the primary data path across a network .... A backbone may be configured as a bus or as a ring; (2) in a wide area network, a high-speed link to which nodes or data switching exchanges are connected. [IBM]

Bookmark method.

Refers to a system designed to leave a marker in an application or presentation to which the system will return when the program is next executed.

Bridge.

A functional unit that interconnects two local area networks that use the same logical link control protocol but may use different access control protocols. [IBM]

Broadband transmission.

In communications, pertaining to transmission facilities whose bandwidth is greater than that available on voice grade circuits and therefore capable of high-speed data transmission. [L&S]

Browser.

A program used to scan and search electronic files.

Bulletin board.

A set of files, stored on a computer, that may be accessed by any user with a terminal and that is controlled by a systems operator, who organizes the files into topical areas. Files are uploaded and downloaded by users, and most bulletin boards allow users to exchange electronic mail. Computer suppliers often maintain a bulletin board to allow users to have access to information system updates and to report on problems encountered. [D]

C

Cache.

(1) A special-purpose buffer storage, smaller and faster than main storage, used to hold a copy of instructions and data obtained from main storage and likely to be needed next by the processor; (2) a buffer storage that contains frequently accessed instructions and data; it is used to reduce access time; (3) an optional part of the directory database in network nodes where frequently used directory information may be stored to speed directory searches. [IBM]

Client/server.

A network system designed to share substantial resources that cannot be provided on every user's machine. The requesting program (client) sends a request to a program at another site (server) and awaits a response.

Compilation.

(1) With respect to computer programs, the result of the implementation of a compiler program used to make a high-language program operable in a computer; (2) the result of aggregating several documents or files. [C]

Cyberspace.

The invisible, intangible world of electronic information and processes stored at multiple interconnected sites, with controlled access and manifold possibilities for interaction.

D

Data.

Scientific or technical measurements, values calculated therefrom, and observations or facts that can be represented by numbers, tables, graphs, models, text, or symbols and that are used as a basis for reasoning or further calculation.[C]



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