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POS or PoS may mean:
- POS is an ancronym for Point of sale, a POS enables an efficient recording of the data that comprises a business transaction when the sale of goods or services to the customer occurs.
- EFTPOS or POS Terminal is a device by which sales transactions can be directly debited to the customer's bank account
- programmable option select, the predecessor to plug-and-play
- colloquially, piece of shit (considered vulgar)
- Part of speech, the role that a word (or sometimes a phrase) plays in a sentence.
- Packet over SONET/SDH, a communications protocol for transferring packets over fiber networks
- P/OS, the Professional Operating System sold by Digital Equipment Corporation for their PRO-300, PRO-350, and PRO-380 PDP-11-compatible line of personal computers. (Given one of the previous definitions, one may properly wonder about the wisdom of such a name, of course.)
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