Service Number

Upon sucessful entry into the United Stars Military initial training program, the service member is issued a service number which he keeps for the remainder of his life, even if when he leaves the military, if he transfers between services, or participates in one of the Enlisted to Officer or Enlisted to Warrant officer programs or even if he goes from being an officer candidate to enlisted personel.

The Service Number standard is as follows: Servicenumber/ Branch cypher - First Letter of last name - Date of birth either in OTT or Standard.