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Os,

symbol for the element osmiumosmium
, metallic chemical element; symbol Os; at. no. 76; at. wt. 190.23; m.p. 3,045±30°C;; b.p. 5,027±100°C;; sp. gr. 22.57 at 20°C;; valence usually +0 to +8.
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Os

(chemistry)

OS

(1)

OS

(2)
[obsolete, ITS], an output spy. See "OS and JEDGAR".

OS

(operating system)
An operating system from IBM for 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.

OS

(Operating System) The master control program in a computer or mobile device. The O-S acronym has been part of the names of various operating systems. Microsoft used DOS for many years in the PC, and Apple used OS 8, OS 9 and OS X in the Mac. For the major functions operating systems perform, see operating system. Some of the operating systems in this encyclopedia that have O-S in their name are TOS, DOS, PC-DOS, MS-DOS, DR-DOS, Mac OS, Mac OS X, iOS, OS/390 and OS/400.
References in periodicals archive ?
Oser has this interesting take on Beckett: "he is a writer of conscience, whose Augustinian rigor will touch the heart (and the funny bone) of many a melancholy churchman" (72)--cruel absurdity expressed in black humor.
Pierre Oser will be in Manila by the invitation of the Goethe-Institut, the German Cultural Center in the Philippines, which promotes cultural exchange between Germany and the Philippines.
Stefan Oser's Easy Studies for Acoustic and Electric Guitar is an easy- to intermediate-level book with pop, blues, rock and Latin pieces for nylon string, steel-string acoustic and electric guitars.
Lee Oser's sophomore novel offers a wry and appealing brew of malcontented characters navigating the absurd deifications which accompany modern celebrity.
Oser, an English professor at the College of the Holy Cross, tells Mr.
In addition, he places the rhetorical analysis of Chesterton within the context of recent debates over ethical criticism involving such figures as Wayne Booth and Martha Nussbaum by placing Chesterton's literary criticism alongside recent neo-Thomist approaches to literature such as Fritz Oehlschlaeger's Love and Good Reasons: Postliberal Approaches to Christian Ethics and Literature and Lee Oser's The Return of Christian Humanism.
p hind EASTE traumati hem, troubled m oser together a rthday.
Lithuanian Antannas Beleckas, 27, of Oser Place, Wolverhampton, also pleaded guilty.
"People who have cookbooks still like to pull out recipes and save them," says Kim Oser, a professional organizer, "just like people who love their GPS still like looking at a map."
"Most people know we are very visible in the community," Oser said, noting that the firm ensures that visibility by being available to comment on risk topics in the news and doing a lot of community and insurance events.
The Return of Christian Humanism: Chesterton, Eliot, Tolkien, and the Romance of History by Lee Oser (Columbia, MO: University of Missouri Press, 2007)
This is a relatively recent change, however; such funding used to come from the Office of Special Education Research (OSER).