These 2 papers describe the development of a computerized class scheduling system aimed at achieving uniform and efficient utilization of staff and physical facilities and a schedule that permits the maximum number of students to fulfill their curricular requirements. In "An Introduction to CUSS," Victor Abell describes the development of this system at Purdue University's main campus, and its successful application at Seattle University, and Purdue's regional campuses in Indianopolis and Calumet. The system's 3 operational phases are explained in detail: resource planning, execution, and utilization measurement. Research is currently underway to alleviate 3 general limitations of CUSS that deter its expansion to the large-scale, main campus schedule. A flow chart and sample input information illustrate the explanation. In the second paper, "Bookmaker: Version I of a Computer Program for Schedule Construction," George Morgan describes the philosophy and logic behind the program "Bookmaker." This program is used in the second phase of the system, execution, in which schedule construction takes place. A unique feature is that Bookmaker can be weighted to give priority to staff wishes, student wishes, or classroom utilization in the schedule design. Sample programs are included. (DS)