http://www.corporateinformation.com/Company-Extensions-Security-Identifiers.aspx

This website provides definitions of company "extensions" and security identifiers.

While U.S. companies are usually followed by "Inc.", many foreign companies have different endings. This website tells you what these terms mean, and where they are used. If you don't know what country a company is based in, this list of identifers might help narrow your search.

Bonds and stocks usually have one or more identifier codes, issued by various clearing houses or other agencies. The purpose of these identifiers is to prevent confusion when discussing a particular security, particularly a bond. While a company will usually only have one class of stock, it can have many different bond issues. There is a list of various security identifiers along with information about their structure and issuers on this site.

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