Peta-
Peta () is a decimal unit prefix in the metric system denoting multiplication by one quadrillion, or 10 (). It was adopted as an SI prefix in the International System of Units in 1975, and has the symbol P. "Peta" is derived from the ancient Greek , meaning "five". It denotes the fifth power of 1000 (1000). It is similar to the prefix ("five"), but without the letter "n" (on the analogy of the prefix "tera" [from the Greek for "monster"] for 1000 looking like ["four"] with a letter missing). Examples: