COM

1. Short for Commercial, com or .com is a domain suffix that is used on the Internet as an identification of commercial related websites.
2. Short for communications or communications port, a COM is a serial port on the PC computer. The computer has the ability of COM1, COM2, COM3 and COM4, which devices, such as a mouse or modem, can be connected.
3. Short for Component Object Model, COM is a component software architecture from Microsoft, which defines a structure for building program routines (objects) that can be called up and executed in a Windows environment.
4. Short for Computer Output Microfilm, COM is creating microfilm or microfiche from the computer.

Also see: Component, DCOM, Dot-com, Modem definitions