Zetta- the 6th letter of the modern and classical Greek alphabet, denotes a value of seven (7) when used as a numeral. Examples: Zetta- Zetta is a decimal unit prefix in the metric system denoting a factor of 10 or . The prefix was added as an SI prefix to the International System of Units (SI) in 1991 and has the symbol Z. Zetta is evocative of the Latin numeral , meaning "seven". Therefore it was used to denote the seventh power of 1000. A prefix of the same value, "hepta", was informally introduced a few years before the promulgation of
Peta, Greece Peta, Greece Peta () is a town and a former municipality in the Arta regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Nikolaos Skoufas, of which it is the seat and a municipal unit. The municipal unit has an area of 105.571 km. In 2011 its population was 1,563 for the town, 4,105 for the community and 4,781 for the municipal unit. Peta is located north of Amfilochia, northeast of Arta, south-southeast of Ioannina and east of Preveza. The Arachthos River and its reservoir lies to the northwest. The municipal unit Peta