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semi-free software

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• sentinel value

  (sen´t&-n&l val´ū) (n.) In programming, a special value that is used to terminate a loop. The sentinel value typically is chosen so as to not be a legitimate data value that the loop will encounter and attempt to perform with. For example, in a loop algorithm that computes non-negative integers, the value “-1” can be […]

• Sequence

  (1) One of the three basic logic structures in computer programming. The other two logic structures are selection and loop. In a sequence structure, an action, or event, leads to the next ordered action in a predetermined order. The sequence can contain any number of actions, but no actions can be skipped in the sequence. […]

• sequence header

  In MPEG encoding, a sequence header is placed before one or more groups of pictures and contains encoding and displaying parameters. To allow for better access and editing, many people place a sequence header after every GOP. Fewer sequence headers result in a smaller file in the final output.

• sequenced packet protocol

  Abbreviated as SPP, a networking protocol that provides reliable transport of packets with flow control in environments where multiple transport connections are established. SPP uses destination ID reference numbers to identify the target end of a transport connection; sequence numbers to keep transmitted packets in the order in which they were sent; and acknowledge numbers […]

• sequential access

  )Refers to reading or writing data records in sequential order, that is, one record after the other. To read record 10, for example, you would first need to read records 1 through 9. This differs from random access, in which you can read and write records in any order. Some programming languages and operating systems […]

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