CAP may refer to any of the following:
1. A cap is the maximum amount of a value. For example, a server may cap the amount of logins to a server to prevent the server from becoming overloaded.
2. A cap is a protective cover found on connections. For example, most computer monitors have a cap over the video connector to prevent any of the pins from being bent.
3. Short for Competitive Access Provider, see the local bypass definition for additional information.
4. A cap is a single capitalized letter.