Peta
This article describes the SI prefix Peta. For other meanings, see Peta (disambiguation)In physics and mathematics, Peta (symbol: P) is a prefix in the SI system of units denoting 1015, or 1,000,000,000,000,000. For example:
1 Petasecond = 1015 seconds
In computer science peta can sometimes 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. To resolve this ambiguity, the term pebibyte has been suggested to mean 250 bytes. However this term is not yet widely used.