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Online Computer Terms Dictionary - C

content addressable memory

(CAM, or "associative memory") A kind of storage device which includes comparison logic with each bit of storage. A data value is broadcast to all words of storage and compared with the values there. Words which match are flagged in some way. Subsequent operations can then work on flagged words, e.g. read them out one at a time or write to certain bit positions in all of them. A CAM can thus operate as a data parallel (SIMD) processor.

CAMs are often used in caches and memory management units.

(1995-02-16)

 


Nearby terms: Consul consultant container class content addressable memory content-based information retrieval Content Data Model content-free

content-based information retrieval

<image, algorithm> (CBIR) A general term for methods for using information stored in image archives.

[Details?]

[IEEE Computer, September 1995].

(1995-11-23)

 


Nearby terms: consultant container class content addressable memory content-based information retrieval Content Data Model content-free contention slot

Content Data Model

(CDM) An SGML-based DoD specification for interactive manuals.

(1995-02-15)

 


Nearby terms: container class content addressable memory content-based information retrieval Content Data Model content-free contention slot context

content-free

1. (By analogy with "context-free") Used of a message that adds nothing to the recipient's knowledge. Though this adjective is sometimes applied to flamage, it more usually connotes derision for communication styles that exalt form over substance or are centred on concerns irrelevant to the subject ostensibly at hand. Perhaps most used with reference to speeches by company presidents and other professional manipulators.

See also four-colour glossies.

2. Within British schools the term refers to general-purpose software such as a word processor, a spreadsheet or a program that tests spelling of words supplied by the teacher. This is in contrast to software designed to teach a particular topic, e.g. a plant growth simulation, an interactive periodic table or a program that tests spelling of a predetermined list of words. Content-free software can be more cost-effective as it can be reused for many lessons throughout the syllabus.

[Jargon File]

(1998-08-26)

 


Nearby terms: content addressable memory content-based information retrieval Content Data Model content-free contention slot context context clash

contention slot

(Or contention period). Minimum time a host must transmit for before it can be sure that no other host's packet has collided with its transmission. If the maximum propagation delay from one host to any other is T, then a host that starts to transmit at time t0 may collide with a host that starts just before t0 + T. The first host will not detect the collision until time t0 + 2T.

 


Nearby terms: content-based information retrieval Content Data Model content-free contention slot context context clash context-free
 

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