The recording of bits such that a 1 (or a 0) in a pulse without a return to the reference condition between pulses. Contrast with return-to-reference recording.
Nonreturn-to-zero recording in which the zeros are represented by a change in the signal condition, and the ones are represented by the absence of a change.
A logic operator having the property that if P is a statement and Q is a statement, then the NOR of P, Q is true if both statements are false, false if at least one statement is true. NOR (P,Q) is often represented by a combination of OR and NOT symbols, such as ~ (P v Q). NOR (P,Q) is also called neither P nor Q. Synonymous with NOT-OR.
A device coordinate specified in an intermediate coordinate system and normalized to some range, typically 0 to 1. A display image expressed in normalized device coordinates lies in the same relative position on any device space.
A logic operator having the property that if P is a statement, then the NOT of P is true if P is false, false if P is true. The NOT of P is often represented by P, -P, ¬P, P'.
The registration of data with a trusted third party that allows the later assurance of the accuracy of the data's characteristics such as content, origin, time, and delivery.
N registers that function as a single register; for example: double-length register, triple-length register, quadruple-length register. Synonymous with N-tuple register.
A control character that may be used as a filler and that may be inserted into or removed from a sequence of characters without affecting the meaning of the sequence; however, equipment control or format may be affected by this character.
A pointer that explicitly does not point to any data object. Depending on the programming language, the null pointer has a representation called "nil", "null", etc.
A discrete representation of a number; for example, the following are four different numerals that represent the same number, i.e., a dozen, by the methods shown:
Pertaining to data that can be expressed by numbers, or to processes and functional units that use such data; for example: physical quantity, mathematical quantity. Synonymous with numerical.
The study of methods for obtaining useful quantitative solutions to problems that have been expressed mathematically, including the study of the errors and bounds on errors in obtaining such solutions.
A technique of operating machine tools or industrial processes, the motion or sequence of which is determined by numerically coded commands. These commands may be generated by a computer-aided design and manufacture system on a data medium that controls a machine tool or an industrial process.