Since the need for good programers exists and will increase, their identification before training is desirable. Until now only single tests of potential ability have been evaluated. In this study several tests used in various combinations were evaluated as test batteries. The IBM Aptitude Test for Programmer Personnel (ATPP) and the Strong Vocational Interest Blank (SVIB) were administered to 68 students enrolled in an introductory computer science course at Michigan State University. Grade point average (GPA) and College Qualification Test (CQT) scores for participants were available from college records. All test scores correlated significantly with course grade (p .05). GPA was found to be the best single predictor of success. Among total test scores, general scholastic aptitude (the CQT) predicted achievement as well as specialized aptitude (the ATPP). However, the best results were found to be obtainable with a judicious choice of subtests emphasizing numerical and spatial reasoning (ATPP Part III, CQT Numerical). An "interest" variable as assessed by the SVIB appeared to identify a dimension discrete from aptitude that was significantly related to course achievement. The results were taken to indicate that instruments presently available can be used effectively to predict achievement in computer programing. (SS/MF)