In this report, Robert Whallon provides a brief description of monothetic subdivisive classification, why it is useful in defining objective typologies in archaeology, and how it can be applied to an archaeological data set using a computer program. Because he wrote at a time when computer programs were run on paper cards, Whallon includes operating instructions for the computer program, including an illustration showing the deck arrangment for the cards. He also includes a source listing of a Fortran IV program for the classification.