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".
Social Security Administration
SSA is headquartered in Woodlawn, Maryland, just to the west of Baltimore, at what is known as Central Office. The agency includes 10 regional offices, 8 processing centers, approximately 1300 field offices, and 37 Teleservice Centers. , about 60,000 people were employed by SSA. Headquarters non-supervisory employees of SSA are represented by American Federation of Government Employees Local 1923. Social Security is the largest social welfare program in the United States. For 2014, the net cost of Social Security was $906.4 billion, an amount corresponding to 21% of US Federal Government expenditures.