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Line 1: − {{stub}}+ − An entity composed of exactly two components.+
Expanded article, removed stub label
'''Binary''' means ''composed of two parts'' and comes from the Latin, originally meaning "two by two". The idea is that a whole is in one of two possible conditions and no other condition is possible. Specifically, the whole is in condition '''1''' or the whole is in condition '''2'''. For example, the switch is on or the switch is off, the page has data on it or the page is blank. Applied to a numbering system, a place holder has no data, represented with the symbol, '''0''' or the place holder has data present, represented as '''1'''. There are no other conditions in a binary system. Electronics commonly use '''0''' to mean "no voltage is present" '''1''' to mean "a voltage is present".
[http://forums.cisco.com/CertCom/game/binary_game_page.htm?site=celc a binary numbering game]
== Examples ==
== Examples ==