THE COMPUTER SYSTEM CONCEPT WILL BE DEVELOPED IN TWO WAYS--FIRST, A DESCRIPTION WILL BE MADE OF THE SMALL COMPUTER-BASED TEACHING MACHINE WHICH IS BEING USED AS A RESEARCH TOOL, SECOND, A DESCRIPTION WILL BE MADE OF THE LARGE COMPUTER LABORATORY FOR AUTOMATED SCHOOL SYSTEMS WHICH ARE BEING DEVELOPED. THE FIRST MACHINE CONSISTS OF THREE ELEMENTS-- A BENDIX G-15 COMPUTER, A LARGE RANDOM ACCESS SLIDE PROJECTOR, AND AN ELECTRIC TYPEWRITER. THE STUDENT SITS IN FRONT OF THE TYPEWRITER AND READS INSTRUCTIONAL ITEMS WHICH ARE DISPLAYED BY REAR-VIEW PROJECTION FROM 35 MM SLIDES IN THE RANDOM ACCESS PROJECTOR. HE THEN ENTERS HIS MULTIPLE CHOICE ANSWER ON THE TYPEWRITER. ANSWERS ARE RECORDED AND EVALUATED IN THE COMPUTER. FEEDBACK IS SUPPLIED BY A TYPEWRITER PRINTOUT. THE COMPUTER DERTERMINES WHICH SLIDE TO PRESENT NEXT AND SELECTS THAT SLIDE FROM THE PROJECTOR, THEN THE CYCLE IS REPEATED. THE DECISION CRITERIA GOVERNING SLIDE SELECTION ARE PREPROGRAMED BY THE PERSON DESIGNING THE LESSON. THE COMPUTER MAY BE PROGRAMED TO SELECT DIFFERENT SLIDE SEQUENCES IN RESPONSE TO A VARIETY OF STUDENT BEHAVIOR. BECAUSE OF SOME LIMITATIONS OF THE MACHINE, A MUCH ENLARGED FACILITY CALLED CLASS (COMPUTER-BASED LABORATORY FOR AUTOMATED SCHOOL SYSTEMS) IS BEING INSTALLED. THE CONTROL UNIT FOR THE CLASS FACILITY IS A LARGE PHILCO 2000 GENERAL-PURPOSE DIGITAL COMPUTER. THE CLASSROOM WHICH IS CONTROLLED BY THIS MACHINE CONTAINS 22 DISPLAY UNITS, 22 RESPONSE DEVICES, AND MONITORING EQUIPMENT FOR THE TEACHER. CLASS ALSO HAS SPECIAL ROOMS FOR SIMULATING THE COUNSELING AND ADMINISTRATIVE FUNCTIONS IN A SCHOOL. CENTRAL RECORDING APPARATUS, ONE-WAY WINDOWS, AND CLOSED-CIRCUIT TELEVISION PROVIDE FOR CLASSROOM OBSERVATION. EACH STUDENT HAS A DISPLAY UNIT AND A RESPONSE DEVICE. THE COMPUTER RECORDS AND ANALYZES ANSWERS, AND THEN DETERMINES WHAT ITEM THE STUDENT SHOULD SEE NEXT. THE CLASS FACILITY CAN BE USED AS A GROUP MODE. THIS PAPER WAS PRESENTED TO THE NATIONAL CONVENTION OF THE DEPARTMENT OF AUDIOVISUAL INSTRUCTION OF THE NEA (MIAMI, APRIL 25, 1961).