If micro is the S.I. prefix for '10 to the power of minus 6', which is the prefix for '10 to the 6th'?
Binary prefix other contexts, the industry uses the multipliers "kilo", "mega", "giga", etc., in a manner consistent with their meaning in the International System of Units (SI), namely as powers of 1000. For example, a 500 gigabyte hard disk holds bytes, and a 1 Gbit/s (gigabit per second) Ethernet connection transfers data at bit/s. In contrast with the "binary prefix" usage, this use is described as a "decimal prefix", as 1000 is a power of 10 (10). The use of the same unit prefixes with two different meanings has caused confusion. Starting around 1998, the International Electrotechnical Commission (IEC) and several other
Metric prefix has a symbol that is used in combination with the symbols for units of measure. For example, the symbol for "kilo-" is 'k', and is used to produce 'km', 'kg', and 'kW', which are the SI symbols for kilometre, kilogram, and kilowatt, respectively. Where the Greek letter 'μ' is unavailable, the symbol for micro 'µ' may be used. Where both variants are unavailable, the micro prefix is commonly written as the lowercase Latin letter 'u'. Prefixes corresponding to an integer power of one thousand are generally preferred. Hence "100 m" is preferred over "1 hm" (hectometre) or "10 dam" (decametres).