Z94.3 - Computer & Information Systems

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OBJECT CODE. (ANSI) Output from a compiler or assembler which is itself executable machine code or is suitable for processing to produce executable machine code.

OCR. (See OPTICAL CHARACTER RECOGNITION.)

OFFLINE. (ANSI/ISO) Pertaining to the operation of a functional unit when not under the direct control of a computer.

ONLINE. (1) (ANSI/ISO) Pertaining to the operation of a functional unit that is under the direct control of a computer. (2) (ANSI) Pertaining to a user’s ability to interact with a computer. (3) (ANSI) Pertaining to the user’s access to a computer via a user terminal.

OPEN SHOP. (1) (ANSI) Pertaining to the operation of a computer facility in which most productive problem programming is performed by the problem originator rather than by a group of programming specialists. The use of the computer itself may also be described as open shop if the user/programmer also serves as the operator.

OPERATING SYSTEM. (ANSI/ISO) Software that controls the execution of programs. An operating system may provide services such as resource allocation scheduling, input/output control, and data management. Although operating systems are predominately software, partial or complete hardware implementations are possible.

OPTICAL CHARACTER RECOGNITION (OCR). (ANSI/ISO) Character recognition that uses optical means to identify graphic characters.

OUTPUT. (1) (ANSI/ISO) Pertaining to a device, process, or channel involved in the production of data by a computer or by any of its components. (2) (ANSI/ISO) An output state, or sequence of states. (3) (ANSI) Information retrieved from a functional unit or from a network, usually after some processing.

OVERFLOW. (ANSI/ISO) In a calculator, the state in which the calculator is unable to accept or process the number of digits in the entry or in the result.

OVERLAY. (1) (ANSI/ISO)  One of several segments of a computer program that, during execution, occupy the same area of main storage, one segment at a time. (2) (ANSI) To load an overlay.

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