What does com mean?

In the computer world, "COM" has several different meanings, as follows:

1. Domain name suffix

.com domain name is the most widely popular universal domain name format in the world. Its name is derived from the English word "commercial", indicating the original intention of registering this domain name by a commercial organization. However, with unlimited registration available for .com, .org and .net, there will ultimately be no difference.

In other words, .com is the most common domain name suffix. Although ".com" is the abbreviation for commercial websites, many personal, educational, and non-profit websites have a .com domain name because it is the easiest to identify. Other popular suffixes include .cn, .net, .org, .gov, and .edu, among others.

2.DOS command files

Another place where "com" may appear on your computer is at the end of the file name, as a file extension. Files ending in ".com" contain a list of instructions that can be executed in a DOS or Windows operating system. The most easily recognized COM file "COMMAND.COM" contains instructions that are referenced during the computer's boot process and also serves as a command shell. Since COM files contain executable commands, you should not open any unknown files ending in .com as they may contain viruses or other malicious instructions.

3. Component Object Model

COM is also the abbreviation of "Component Object Model", which is a software interface standard developed by Microsoft. It provides a standard way for programmers to create and share objects (used in object-oriented programming). The Component Object Model includes OLE (Object Linking and Embedding) and ActiveX technologies. The latest version of COM, COM, was released in Windows 2000 and supports Microsoft Transaction Server (MTS) and . net applications.

The above is the detailed content of What does com mean?. For more information, please follow other related articles on the PHP Chinese website!