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Or the 0Xs, is the decade that begins in the year 2000 and ends in the year 2009. The zero refers to the decade and the X refers to an unknown or generalized number or year between 0 and 9. This term is Used as one way to avoid confusion with the 2000s (Two-Thousands or 2XXXs) which describes the period between 2000 and 2999; and the Twenty-Hundreds (or 20XXs), which describe the period between 2000 and 2099.
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