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Wikipedia definition
1. 1000000000 (number)1,000,000,000 (one billion, short scale; one thousand million or milliard, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. In scientific notation, it is written as 10. A billion traditionally equated to one million, million, (1,000,000,000,000) though the short scale (American English) billion of merely one thousand million (1,000,000,000) has been adopted in finance and increasingly in other fields.
Read “1000000000 (number)” on English Wikipedia
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Read “1000000000 (number)” on DBpedia

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