An OpScan 100 optical scanner was used to score test materials received at the Southwest Regional Laboratory (SWRL) during the tryout of SWRL's Instructional Management System (IMS). Once a tape had been produced by the optical scanner, it was interpreted and edited by a series of computer routines which prepared the data for further processing by IMS. This document described the entire sequence of data submission, interpretation, and conversion. Error message reports produced by the programs are described, and examples of the input forms for the optical scanner are provided. (DGC)