National Insurance number
The National Insurance number is used as a reference number in the Pay As You Earn system, and also by the self-employed. It is also used in applications for Individual Savings Accounts (ISAs), to check that an individual has opened only one ISA in a tax year.
Social programs in the United States
The Social Security program mainly refers to the Old Age, Survivors, and Disability Insurance (OASDI) program, and possibly the unemployment insurance program. Retirement Insurance Benefits (RIB), also known as Old-age Insurance Benefits, are a form of social insurance payments made by the U.S. Social Security Administration paid based upon the attainment old age (62 or older).