Keywords: Early SSA accounting operations.jpg en A scene from the U S Social Security Administration SSA 's early accounting operations in Baltimore circa 1936 The issuing of Social Security numbers and the creation of earnings records on all Americans covered by Social Security was the largest bookkeeping operation in the history of the world http //www ssa gov/history/acalcs html US Social Security Administration 1936 PD-USGov Social Security Administration United States Tabulating machines People using computers before 1940 1936 in Maryland IBM punch card hardware |