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.
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   2. Something shaped like the letter O; a circle or oval.
      "This wooden O [Globe Theater]". --Shak.
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   3. A cipher; zero. [R.]
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            Thou art an O without a figure.       --Shak.
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	OES
       Olivetti EntsorgungsService (Olivetti)

	

	OES
       Open Enterprise Server (Novell, Linux)