BIR Definition

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BIR is Bureau of Internal Revenue, Benefit/Investment Ratio, or Best Incremental Return.

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UNITIZE is to separate or classify into units, e.g. auto manufacturers unitize along model designations.

STANDARD RATE AND DATA SERVICE (SRDS), in advertising, is a company that produces a directory for each different type of media; normally listing: rates, circulation, contacts, markets serviced, etc.

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