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| the second power of a quantity, expressed as a2 = a ? a, where a is the quantity |
| an average, especially the arithmetic average |
| binary notation or binary system | |
| —n | |
| a number system having a base of two, numbers being expressed by sequences of the digits 0 and 1: used in computing, as 0 and 1 can be represented electrically as off and on | |
| binary system or binary system | |
| —n | |