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. The program, when run, must perform each action in order with no possibility of skipping an action or branching off to another action.
All logic problems in programming can be solved by forming algorithms using only the three logic structures, and they can be combined in an infinite number of ways. The more complex the computing need, the more complex the combination of structures.
(2)A structured series of shots or scenes with a beginning, middle and end. The term sequence can be applied to video, audio, or graphics.
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- 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 […]
- serial
One by one. Serial data transfer refers to transmitting data one bit at a time. The opposite of serial is parallel, in which several bits are transmitted concurrently.
- serial mouse
A mouse that connects to a computer via a serial port. The other common type of mouse is a PS/2 mouse, which plugs into a PS/2 mouse port.