What machine did Herman Hollerith build?

Answer 1

• card tabulator
• card sorter
• pantograph card punch

These were all manually operated, but the tabulator and sorter used electromechanical circuits to automatically perform multiple operations in the time it took the operator to manually cycle the machine once.

These machines made it possible to complete the 1890 census in a single year, while the 1880 census (a much smaller task) had taken 8 years with traditional hand methods.