The Beatles, released on November 13, 2000. The album features every #1 British and American hit single by the band released from 1962 to 1970. 1 sold 3.6 million units in its first week and more than 12 million in three weeks worldwide, becoming the fastest selling album of all time and the biggest selling of 2000 and of the decade so far. The collection also premiered at #1 in the U.S. and other countries.

Black Heart Procession is an album by the American indie band The Black Heart Procession. It was released on January 1, 1998 on Headhunter.

The 1 Broadway–Seventh Avenue Local is a service of the New York City Subway. It is colored red on station signs, the NYC Subway map and the front and side route signs on the subway cars because it represents service provided on the IRT Broadway-Seventh Avenue Line, which it follows for its entire route. For more information on the line, including history, see that article.

used of a single unit or thing; not two or more; -- representing the number one as an Arabic numeral

the smallest whole number or a numeral representing this number; "he has the one but will need a two and three to go with it"; "they had lunch at one"

used of a single unit or thing; not two or more; "`ane' is Scottish"