Thirty-two computer-based lesson modules in organic chemistry were developed at the University of Texas (Austin) over an 18-month period and evaluated in varying classroom situations for three semesters starting in the Fall of 1972. The modules were designed as supplements to the traditional organic chemistry course of the University. As such, they emphasized tutorial-drill and experiment simulation applications in some of the basic organic chemistry concepts including nomenclature, classes of organic compounds, syntheses, reactions, preparations, laboratory exercises, and spectral interpretations. This paper includes descriptions of the modules together with a summary of their initial use and evaluation. (Author/DGC)