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OBEX

A triangular area of grey matter and thickened ependyma in the medulla oblongata

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OBJECT

1 In the context of object linking and embedding, information such as a drawing which may be linked or embedded into another document. 2 In the context of object oriented programming, a combination of variables, data structures and procedures stored as an entity called a 'method

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OBJECT CODE

Translated version of a program which has been assembled or compiled. Cf source code,

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OBJECT LINKING AND EMBEDDING

A method to share and transfer information between application programs, eg a drawing may be embedded into a text document,

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OBJECT ORIENTED PROGRAMMING

An approach to programming using the concept of an object. The approach uses a hierarchical object structure which reflects the system to be modelled. Programming languages offering this approach include Smalltalk, modula-2, C++ and some versions of Pascal. Abbrev OOP.

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OBJECT PERMANENCE

Knowledge of the continued existence of an object, even when the object is not accessible to direct sensory awareness. According to J Piaget this ability does not develop until infants are approximately eight months or more. Also object constancy.

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OBJECTIVE

Usually the lens of an optical system nearest the object. Abbrev OG, objective glass for microscope work.

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OBJECTIVE ANALYSIS

A method of processing the original observations by computer to give all values of the atmospheric variables needed to produce a numerical forecast, in contrast to a subjective analysis made by scrutinizing observations plotted on charts. The computer programs, after checking for transmission and other errors, produce interpolated grid-point values dynamically con

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OBJECTIVE NOISE METER

Sound level meter in which noise level to be measured operates a microphone, amplifier and detector, the last named indicating noise level on the phon scale. The apparatus is previously calibrated with known intensities of the reference tone, 1 kHz, suitable weighting networks and an integrating circuit being incorporated in the amplifier to simulate relevant properties of the ear in appreciating noise,

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OBJECTIVE PRISM

A narrow-angle ca 1 prism placed in front of the objective lens or primary mirror of a telescope, which causes the image of each star to give a small spectrum. Those of many objects within a small field can thus be recorded simultaneously, either photographic

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