MODERN research workers make extensive use of machine methods for processing the statistical phases of their projects. In many cases, projects could not even be attempted without the aid of computing and other data processing facilities. The first step in doing the statistical phases by machine is to punch the data into IBM cards. These are then fed into the computer or other equipment for whatever processing is required. Most commonly, data sheets prepared by the people doing the actual research are given to professional key punch operators, who read the data and punch it into the appropriate sections of data cards. The cards and data sheets are then sent to another operator who verifies the correctness of the punching on a machine called a verifier. This method eliminates operator error and has proven very satisfactory in the vast majority of applications.
"Application of I. B. M. Port-O-Punch,"
Ames Forester: Vol. 46
, Article 5.
Available at: https://lib.dr.iastate.edu/amesforester/vol46/iss1/5