A military specialty refers to a specific job or role within the armed forces, requiring particular skills and training. Each branch of the military (Army, Navy, Air Force, Marines) has various specialties, such as infantry, engineering, aviation, medical, intelligence, and logistics. These specialties are often designated by Military Occupational Specialties (MOS) codes in the U.S. Army or Navy Enlisted Classification (NEC) in the Navy, and they determine a service member’s duties and career path.