COM may refer to any of the following:
1. Short for Commercial, com or .com is a domain suffix that is used on the Internet to identify a commercial related website and is the most common type of domain suffix on the Internet. For example, the address computerhope.com is a .com address.
3. Com is short for communications or communications port, see communications port definition for further information.
4. Short for Component Object Model, COM is a component software architecture from Microsoft. It defines a structure for building program routines (objects) that can be called up and executed in a Windows environment.
5. Short for Computer Output Microfilm, COM is creating microfilm or microfiche from the computer.