CEPME
CEPME = College of Enlisted Professional Military Education
These folks, with their headquarters in Montgomery, Alabama, produce and distribute the enlisted professional militray education curriculum for the Air Force.
AFSC
AFSC = Air Force Specialty Code
Basically, your AFSC is the code assigned to your job in the Air Force. This code is used in many primarily for assignments, promotion rates and training purposes.
AFI
AFI - Air Force Instruction
These instructions are what give Air Force members the information necessary to do their job. They tell how, when, where, and sometimes why things are to be done in the Air Force. There is an AFI for almost every aspect of Air Force life.