Everything about Peta- totally explained
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
petametre = 10
15 metres
1
petasecond = 10
15 seconds
Adopted in 1975, it comes from the
Greek πέντε, meaning
five, because it's equal to 1000
5. It is based on the model of
tera- (from Greek τέρας = 'monster', but looking like from the Greek for "four" with a letter missing), and so
peta-, coming from, omits the third letter,
n.
Examples:
In
computer science peta- can sometimes mean 1 125 899 906 842 624 (1024
5 or 2
50), 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 2
50 bytes.
Further Information
Get more info on 'Peta-'.
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