Peta (P)
Peta (P) is the prefix for a quadrillion. In decimal notation it is the 15- digit number 1,000,000,000,000, in exponential notation it is: 10exp15 or 10high15.
The prefix Peta is defined like all other mathematical prefixes in the Système International ( SI) and is used in storage technology for the specification of storage capacities ( PB) in tape libraries. One petabyte corresponds to 1,000 terabytes ( TB).