Social Security Administration очень много изменений hijacked and subsumed into multiple other uses Social Security Number Chronology this page Social Security Number Chronology www.ssa.gov http://www.ssa.gov/history/ssn/ssnchron.html official taxpayer identification number http://www.ssa.gov/history/ssn/ssnchron.html Short history of the SSN official taxpayer identification number Security Number Chronology hijacked and subsumed into multiple other uses Social Security Administration's web site Executive Order 9397 www.ssa.gov