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
TERA (video game) to the new model, the "Chronoscrolls" mentioned above are being phased out, and are no longer sold by the developer, nor usable to extend game time. Existing chronoscrolls can be sold to merchants for 2,000 gold. The Japanese and Korean versions of "TERA" also became free to play in December 2012 and January 2013, respectively. "TERA" has been met with generally favorable reviews, citing the action-based gameplay, huge and widely varied seamless world, the exciting and recurring Big Ass Monster (BAM) fights, the ease of using the game's auction house (called the Trade Broker) and lush, detailed graphics as the