P/OS
專家作業系統 P/OS
Com·po n.; pl. -pos Short for Composition; -- used, esp. in England, colloq. in various trade applications; as : (a) A mortar made of sand and cement. (b) A carver's mixture of resin, whiting, and glue, used instead of plaster of Paris for ornamenting walls and cornices. (c) A composition for billiard balls. (d) A preparation of which printer's rollers are made. (e) A preparation used in currying leather. (f) Composition paid by a debtor.
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