Discusses and compares advantages and disadvantages of large and small computer-based instructional systems. Predicted and actual costs in two systems--PLATO, which uses a mainframe system, and VITAL, a microcomputer-based system--are analyzed, and cost comparisons are made based on class size. (LRW)

Describes current status of library school technological support systems and determines effectiveness of various laboratory configurations by assessing relationship of selected input variables to following output measures: number of courses requiring laboratory use, number of database systems available, a service index, and an equipment…