Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 1,000,000,000 (one billion, short scale; one thousand million, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. In scientific notation, it is written as 109. In modern (short scale) English usage, it is usually called a billion (although in many other languages and long scale usage, a billion means 1,000,000,000,000 – a million millions). In South Asian English, it is known as 100 crore. The term milliard can also be used to refer to 1,000,000,000; this terminology is rarely used in English, but often in other languages.

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