Every citizen of South Korea over the age of 17 is issued an ID card called "Jumindeungrokjeung" (주민등록증). It has had several changes in its history, the most recent form being a plastic card meeting the ISO 7810 standard. The card has the holder's photo and a 15 digit ID number calculated from the holder's birthday and birthplace. A hologram is applied for the purpose of hampering forgery. This card has no additional features used to identify the holder, save the photo. Other than this card, the South Korean government accepts a Korean driver's license card, an Alien Registration Card, a passport and a public officer ID card as an official ID card.