Selective Service System
The Selective Service System (SSS) is an independent agency of the United States government that maintains a database of registered male U.S. citizens and other U.S. residents potentially subject to military conscription ("the draft"). Although the U.S. military is currently an all-volunteer force, registration is still required for contingency planning and preparation for two types of draft: a general draft based on registration lists of males aged 18–25 years old and a special-skills draft based on professional licensing lists of workers in specified health care occupations.