Service number
Until 1960, National Servicemen who voluntarily remained in the Armed Forces continued to use their National Service numbers. Until 2007 and the introduction of the Joint Personnel Administration (JPA) system, Army Officers were issued with a six-digit Personal Number, as opposed to the eight-digit Army Number for enlisted personnel. Newly commissioned officers now receive an eight-digit service number, but six-digit Officers' Personal Numbers issued prior to the introduction of JPA remained unchanged.