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OS 音標拼音: ['ɑs] n. 骨,孔,穴裂口 骨,孔,穴裂口 os n 1: a mouth or mouthlike opening 2: a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known [synonym: {osmium}, {Os}, {atomic number 76}] 3: (computer science) software that controls the execution of computer programs and may provide various services [synonym: {operating system}, {OS}] 4: the left eye [synonym: {oculus sinister}, {OS}] 5: rigid connective tissue that makes up the skeleton of vertebrates [synonym: {bone}, {os}] O \O\ ([=o]), n.; pl. {O's} or {Oes} ([=o]z). 1. The letter O, or its sound. "Mouthing out his hollow oes and aes." --Tennyson. [1913 Webster] 2. Something shaped like the letter O; a circle or oval. "This wooden O [Globe Theater]". --Shak. [1913 Webster] 3. A cipher; zero. [R.] [1913 Webster] Thou art an O without a figure. --Shak. [1913 Webster] Os \Os\, n.; pl. {Ossa}. [L.] A bone. [1913 Webster] Os \Os\, n.; pl. {Ora}. [L.] A mouth; an opening; an entrance. [1913 Webster] Os \Os\, n.; pl. {Osar}. [Sw. [*a]s ridge, chain of hills, pl. [*a]sar.] (Geol.) One of the ridges of sand or gravel found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See {Eschar}. [1913 Webster] Os \Os\, n. (Chem.) The chemical symbol for the element {osmium}. [PJC] 1. {operating system}.
2. [obsolete, {ITS}], an output spy. See "{OS and JEDGAR}". 3. their {System/360} line of hardware announced in 1964. OS was planned with several flavours that were supposed to be compatible. OS was late, memory hungry and not able to reach the marketing objectives of IBM for the 360/30, the planned successor of the {IBM 1401}. IBM then decided to design a new operating system for the low end machines which they called {DOS/360}. [{Jargon File}] (1997-09-22) |
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