SSEC Arithmetic Unit

Photo: [83]

Fig 3: A section of the SSEC arithmetical unis showing arrangement of electronic tubes that perform the basic counting operations of the Calculator.

"Electronic curcuits are used for all the arithmetical operations, for part of the control operations, and for part of the memory; in fact, they are used wherever highest speed is required." [83].

Frank da Cruz / / Columbia University Computing History / Sep 2003