This comparison of the cost effectiveness of conventional, individualized, computer-assisted (CAI) and computer-managed instruction (CMI) for military training is based on data drawn from experiments of limited duration with relatively few students. All findings are confounded by effects that may be due to either CAI or CMI in comparison to conventional instruction, or to the revisions in course materials needed to modify a course from conventional to computer-based instruction. Analysis of these data indicate that, while CAI and CMI save about 30 percent (median) of the time required by students to complete the same courses given by conventional instruction, student attrition appears to increase with CAI or CMI as compared to conventional instruction; changes in student quality may account for this increase. It was concluded that students prefer CAI or CMI to conventional instruction, attitudes of instructors are unfavorable to CAI and CMI, individualized instruction (without computer support) saves student time, and little additional student time is saved when the same courses are given by CAI or CMI. Cost savings attributed to CAI and CMI are based on estimates of pay and allowances of students for time saved by these methods. (Author/MER)