C2 or C-2 can refer to:
- Vitamin C2, a name sometimes used for Choline.
- C2, an international standard paper size (458×648 mm), defined in ISO 216.
- Coca-Cola C2, a soft drink launched by The Coca-Cola Company in 2004.
- C2, a file transfer protocol.
- HMS C2 , a C-class submarine of the Royal Navy.
- USS C-2, a C-class submarine of the United States Navy.
- USS Charleston (C-2), a protected cruiser of the United States Navy.
- The Grumman C-2 Greyhound, a cargo aircraft of the United States Navy.
- The Citroën C2, a car produced by Citroën in 2004.
- C2, a form of plastic explosive.
Last updated: 05-30-2005 02:40:52