com or .com
the com in .com means commercial
One of several top-level domains assigned to URLs that are of a commercial nature (for example, www.netlingo.com). Other domain suffixes include .ac, .co, .mil, .gov, .net, .org, and a long list of country codes.
For a list of new domain name suffixes, read the domain name definition. FYI: As of early 2007, there were about 62 million ".com" names in use ;-) Internet trivia!
NetLingo Classification: Technical Terms