The report lists manufacturers alphabetically by licensee name or most commonly known trade or product name. Trade names may, however, represent different corporate entities. Manufacturers include both companies that produce finished firearms, as well as those that produce components for firearms. For purposes of the study, once a company no longer registers production figures with ATF, it is assumed to no longer be producing firearms under that licensee name, and production information may not be available for companies that are in fact still in business or have changed their licensee or trade name. Caliber listings include not only all handguns produced of that caliber but also intermediate calibers that are greater than the previous caliber listing. For example, the 45-caliber pistol listing also includes 40-caliber pistols and 10-mm pistols. For each company listed in the study, address and telephone information and statistics on production history are provided.