001, O01, or OO1 may refer to:
- 1 (number), a number, a numeral
- 001, fictional British agent, see 00 Agent
- 001, former emergency telephone number for the Norwegian fire brigade (until 1986)
- AM-RB 001, the code-name for the Aston Martin Valkyrie sports car
- 1992 OO1, the asteroid 10111 Fresnel
- 1997 OO1, the asteroid 9987 Peano
- O01, an allele, see ABO
- O01 Heussler Hamburg Heliport, see list of airports in New York
- 001, also known as the Princess of Klaxosaurs, is a character and the central antagonist from DARLING in the FRANXX.
- 001, the code for the World in the UN M49 standard for area codes
- Player 001, a character from the South Korean survival drama Squid Game.
- Zeekr 001, an electric vehicle produced by Geely
This disambiguation page lists articles associated with the same number.
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