Mass Effect & Mass Effect 2
The Alliance Military Vocational Code system classifies the career path of all serving personnel. The MVC consists of one letter and one number. A soldier's MVC indicates proficiency, not rank. The letter notes career path; the number indicates level of experience, as indicated by service record, technical scores, and commendations. All 26 letters are used, and numbers run from 1 to 7. N is the letter code for Special Forces personnel.