The original Social Security Act and the current version of the Act, as amended encompass several social welfare and social insurance programs. The larger and better known programs are:
- Federal Old-Age, Survivors, and Disability Insurance
- Unemployment benefits
- Temporary Assistance for Needy Families
- Health Insurance for Aged and Disabled (Medicare)
- Grants to States for Medical Assistance Programs (Medicaid)
- State Children's Health Insurance Program (SCHIP)
- Supplemental Security Income (SSI)
U.S. Social Security is a social insurance program funded through dedicated payroll taxes called Federal Insurance Contributions Act (FICA). Tax deposits are formally entrusted to Federal Old-Age and Survivors Insurance Trust Fund, or Federal Disability Insurance Trust Fund, Federal Hospital Insurance Trust Fund or the Federal Supplementary Medical Insurance Trust Fund. The main part of the program is sometimes abbreviated OASDI (Old Age, Survivors, and Disability Insurance) or RSDI (Retirement, Survivors, and Disability Insurance). When initially signed into law by President Franklin D. Roosevelt in 1935 as part of hisNew Deal, the term Social Security covered unemployment insurance as well. The term, in everyday speech, is used to refer only to the benefits for retirement, disability, survivorship, and death, which are the four main benefits provided by traditional private-sector pension plans.