POSIX An IEEE trial-use standard (P1003) that defines the behavior of a set of supervisor calls, basing these closely on those found in UNIX. However, POSIX is not itself an operating system so much as a formal description of one form of operating system of which UNIX is a specific instance. The intention is that a program written in such a way as to use only those functions defined by the POSIX specifications will be readily portable between different operating systems, provided that these are all conformant to the POSIX definitions.
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Operation , operation 1. A function from Sm (see Cartesian product) into S itself, where S is some set specific to the function. Such a function is usually refer… Operator , op·er·a·tor / ˈäpəˌrātər/ • n. 1. a person who operates equipment or a machine: a radio operator. ∎ (usu. the operator) a person who works for a tele… Operating Systems (software) , An operating system is the software program that allows all the parts of a computer system to function. It controls everything from accepting input f… operate , op·er·ate / ˈäpəˌrāt/ • v. 1. [tr.] (of a person) control the functioning of (a machine, process, or system): a shortage of workers to operate new ma… GKS Abbrev. for graphical kernel system. , GKS Abbrev. for graphical kernel system. A set of graphical functions used by applications programmers with the names and functions defined in ISO 79… Operational Amplifier , operational amplifier (op-amp) A very high gain voltage amplifier having a differential input, i.e. its output voltage is proportional to (and very m…
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