Sequential Instruction System (SIS)

This article describes a relatively simple conversational computer system to handle instructional texts or to perform a computer-aided testing. The system proceeds in a sequential mode with possibilities for branching forward or backward from where a sequential course is resumed. Instructional or explanatory texts and/or multiple choice questions may be displayed. According to the answers the correctness or incorrectness of the reply is indicated. After each incorrect answer references or explanations are given. If desired, these explanatory frames can also be accessed after correct answers. After completion of a course the score is displayed. SIS produces a log for the instructor including answers to individual questions and summary scores. The system is written in FORTRAN. It is designed to run under O.S. on IBM 360 series computers with 2260 cathode ray tube (CRT) displays. It exists in two versions, one operating under a stand-alone attention handler for local displays, the other requiring the B.E.S.T. (Baylor Executive System for TeleProcessing) as message control program. In this case, remote CRT's, teletypes and typewriter-type terminals may also serve as user terminals. Though a few courses have been implemented, SIS is the basic vehicle, not the content of courses.