".com" (commercial) is a generic top-level domain (gTLD) used on the Internet's Domain Name System. It was one of the original top-level domains, established in January 1985, and has grown to be the largest TLD in use. It is currently operated by VeriSign. It is consistently pronounced as a word, dot-com, and has entered the common language this way.
Although .com domains are officially intended to designate commercial entities (others such as government agencies or educational institutions have different top-level domains assigned to them), there has been no restriction on who can register .com domains since the mid-1990s. The opening of the .com registry to the public coincided with the commercialization and popularization of the Internet, and .com quickly became the most common top-level domain for websites. Many companies which flourished in the period between 1997-2001 (the time known as the "dot-com bubble") went so far as to incorporate .com into the company name; these became known as dot-coms or dot-com companies.
© Christian Pursell 2006