USMC (395)

Marine Corps jobs are classified as MOS's (Military Occupation Specialities).    Jobs with similiar MOS's are arranged in groups known as Occupational Fields.  The following is a list of jobs broken down into occupational fields.  This information is also contained in the Marine Corps Order (MCO 1200.17A) dated June 4, 2009.  It is commonly known as the MOS Manual.

US Army (154)

United States Army jobs are broken down into MOSC's (Military Occupational Specialty Codes).    Jobs with similiar MOS's are arranged in groups known as Career Management Fields.   The MOS code (MOSC), consisting of nine characters, provides information about a soldier's MOS. It is also used for automated management systems and reports.  This information is also contained on the PAM XXI Army website. 

US Navy (68)

The Navy Enlisted Occupational Classification System (NEOCS) provides the means by which all Navy enlisted personnel are classified. To support enlisted personnel planning, procurement, training, promotion, distribution, assignment, and mobilization within that classification system, the Navy has established specific standards. These standards define minimum skill and knowledge requirements for enlisted personnel at each paygrade and within each career field.  This information is also available in Unites States Navy document NAVPERS-18068F dated January, 2004.

USAF (159)

The Air Force Specialty Code (AFSC) is an alphanumeric code used by the United States Air Force to identify an Air Force Specialty (AFS). Officer AFSCs consist of four characters and enlisted AFSCs consist of five characters. A letter prefix or suffix may be used with an AFSC when more specific identification of position requirements and individual qualifications is necessary.