Peta

For the bread, see: pita.

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Peta (symbol: P\) is a prefix in the SI system of units denoting 10¹⁵, or 1 000 000 000 000 000.

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In computer science peta can mean 1 125 899 906 842 624 (1024⁵ or 2⁵⁰), instead of 1 000 000 000 000 000, especially when used to prefix the byte, giving a petabyte.

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PETA is an organization: People for the Ethical Treatment of Animals