| 2 | | http://en.wikipedia.org/wiki/IEEE_1541-2002 |
| | 2 | |
| | 3 | The following two quotes are from http://en.wikipedia.org/wiki/IEEE_1541-2002 |
| | 4 | |
| | 5 | |
| | 6 | "While the International System of Units (SI) defines multiples based on powers of ten (like k = 103, M = 106, etc.), a different definition is sometimes used in computing, based on powers of two (like k = 210, M = 220, etc.) This is due to the use of binary addressing for computer memory locations." |
| | 7 | |
| | 8 | "IEEE 1541 recommends: |
| | 9 | * a set of units to refer to quantities used in digital electronics and computing: |
| | 10 | * ''bit'' (symbol 'b'), a binary digit; |
| | 11 | * ''byte'' (symbol 'B'), a set of adjacent bits (usually, but not necessarily, eight) operated on as a group; |
| | 12 | * ''octet'' (symbol 'o'), a group of eight bits; |
| | 13 | * a set of prefixes to indicate binary multiples of the aforesaid units: |
| | 14 | * ''kibi'' (symbol 'Ki'), 2<sup>10</sup> = {{gaps|1|024}}; |
| | 15 | * ''mebi'' (symbol 'Mi'), 2<sup>20</sup> = {{gaps|1|048|576}}; |
| | 16 | * ''gibi'' (symbol 'Gi'), 2<sup>30</sup> = {{gaps|1|073|741|824}}; |
| | 17 | * ''tebi'' (symbol 'Ti'), 2<sup>40</sup> = {{gaps|1|099|511|627|776}}; |
| | 18 | * ''pebi'' (symbol 'Pi'), 2<sup>50</sup> = {{gaps|1|125|899|906|842|624}}; |
| | 19 | * ''exbi'' (symbol 'Ei'), 2<sup>60</sup> = {{gaps|1|152|921|504|606|846|976}}; |
| | 20 | * that the first part of the binary prefix is pronounced as the analogous SI prefix, and the second part is pronounced as ''bee''; |
| | 21 | * that SI prefixes are not used to indicate binary multiples." |
