The extension, or TLD Top Level Domain, that you choose for your web address can vary depending on availability, the type of business, the location of the business and a variety of other factors. Today there are many options. Common TLDs include .com (commercial), .org (organization), .edu (educational institutions), .net (networks), .gov (U.S. government)and .mil (U.S. military). Some of these options are only applicable to certain qualifying companies or organizations. For instance, only the US government agencies can register a domain name using the . gov extension. Other restrictions apply. The most commonly used extensions for US companies is the .com. You may want to consider using a .net, if your first choice domain is not available, but keep in mind that you may unwittingly send your viewers to a competitor’s site.