National Insurance number
The National Insurance number is a number used in the United Kingdom in the administration of the National Insurance or social security system. It is also used for some purposes in the UK tax system. The number is described by the United Kingdom government as a "personal account number".
Pensions in Turkey
Until May 2006, there were three separate social security institutions: SSK, for private and public sector workers; Emekli Sandiği (ES), for civil servants; and Bağ-Kur, for self-employed workers and farmers. In 2006 these were all merged into one institution, the Sosyal Güvenlik Kurumu (Social Security Institution, SGK).