In the United States, Social Security is the commonly used term for the federal Old-Age, Survivors, and Disability Insurance (OASDI) program and is administered by the Social Security Administration. The original Social Security Act was signed into law by President Franklin D. Roosevelt in 1935, and the current version of the Act, as amended, encompasses several social welfare and social insurance programs. Social Security is funded primarily through payroll taxes called Federal Insurance Contributions Act tax (FICA) or Self Employed Contributions Act Tax (SECA). Tax deposits are collected by the Internal Revenue Service (IRS) and are formally entrusted to the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund, the two Social Security Trust Funds. These two trust funds purchase government securities, the interest income from which is used presently to fund the monthly allocations to qualifying citizens.