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Kilo is a decimal unit prefix in the metric system denoting multiplication by one thousand (10 3). It is used in the International System of Units , where it has the symbol k , in lowercase . The prefix kilo is derived from the Greek word χίλιοι ( chilioi ), meaning "thousand".
A similar system is used in natural gas sales in the United States: m (or M) for thousands and mm (or MM) for millions of British thermal units or therms, and in the oil industry, [30] where MMbbl is the symbol for "millions of barrels". This usage of the capital letter M for "thousand" is from Roman numerals, in which M means 1000. [31]
kyr was formerly common in some English language works, especially in geology and astronomy, for the unit of 1,000 years or millennium. The "k" is the unit prefix for kilo-or thousand with the suffix "yr" simply an abbreviation for "year". Occasionally, the "k" is shown in upper case, as in "100 Kyr"; this is an incorrect usage. "kyr" itself is ...
1000 or one thousand is the natural number following 999 and preceding 1001. In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: 1,000. A group of one thousand units is sometimes known, from Ancient Greek, as a chiliad. [1]
The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement. It is the only system of measurement with official status in nearly every country in the world, employed in science ...
The prefix geop and term "geopbyte" have been used in the information technology industry to refer to 10 30 bytes, following "brontobyte". [ 14 ] The ascending prefixes peta ( 1000 5 ) and exa ( 1000 6 ) are based on the Greek-derived numeric prefixes "penta" (5) and "hexa" (6).
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k, informal abbreviation for kibibit (symbol: kb or kib or Kb or kbit or kibit or Kbit) 1024 bits; k, informal abbreviation for kilobit (symbol: kb or kbit) 1000 bits; k or K, abbreviation for kilometre (SI symbol: km) (especially in measured-distance sports, e.g. "10K run") k or K, abbreviation for kilohm (symbol; kΩ), a measure of resistance ...