The United States Air Force Academy Cadet Wing (AFCW) is the student body of the United States Air Force Academy. The students, called "cadets", are divided into four classes, based on their year in school, much like a civilian college. They are not referred to as freshmen, sophomores, juniors and seniors, however, but as fourth-, third-, second- and first class cadets, respectively. Fourth class cadets (freshmen) are sometimes referred to as "doolies," a term derived from the Greek word δοῦλος ("doulos") meaning "slave" or "servant." Members of the three lower classes are also referred to as "4 degrees," "3 degrees" or "2 degrees" (or "4-digs", 3-digs", and "2-digs" respectively) based on their class. First-class cadets (seniors) are referred to as "firsties." In the military structure of