Exports and Security, Computerworld, 19 Jan 1976, Page 13, ...the Watson lab at Columbia were using IBM 601 calculating punches (600 multiplications, not per second or per millisecond, but per hour) to do shock wave partial differential equation calculations in 1945!...
1931, IBM Archives, ...New products introduced during the year include...and the IBM 600 series calculating machines, the first IBM machines to perform multiplication and division...
