A system of computer programs designed to control the administration of adaptive ability tests was developed and used for over 2500 hours of ability measurement. The system is capable of administering any combination of two kinds of tests to a given individual without interruption. Each test can be based on one of six different testing strategies and can administer items selected from up to nine different item pools within each strategy. The system is designed to accept either multiple-choice responses or free-response numeric responses. No feedback, feedback after each item, or item-by-item feedback upon completion of testing can be selected differentially for each test and each testee. The requirements of the research design and constraints of the computer system as well as practical considerations are detailed and their role in the design of the system are discussed. Technical requirements of the software system and problems which might arise in a transfer of the software system to another computer system are considered. Some basic concepts of computer programming are developed as an aid to the reader not technically trained in computer concepts. For a related document, see TM003316. (Author)