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
RS Tera RS Tera The RS Tera is a one-man monohull dinghy in the RS Sailing range of sailing boats. It is recognised by the International Sailing Federation (ISAF) as an international class, and is a popular boat for beginners and for children to race. The RS Tera is suitable for introducing newcomers to the sport of sailing, but is also a good boat to race. The boat is highly robust, and it is built with a self draining cockpit and is easy to right after a capsize, in addition to which it has a floating daggerboard. The boat is fairly small