IN THE FIRST PART OF THE DOCUMENT, RESULTS OF GROUP DISCUSSIONS ON THE USE OF PROGRAMED INSTRUCTION (PI) AND TEACHING MACHINES IN DEVELOPING COUNTRIES ARE SUMMARIZED, EMPHASIZING (1) PROBLEMS OF DEVELOPING NATIONS, (2) QUESTIONS ON PI METHODS AND MATERIALS, AND (3) STRATEGIES FOR THE INTRODUCTION OF PI. THE SECOND PART OF THE DOCUMENT IS AN ESSAY DISCUSSING VARIOUS FORMS OF PI, INCLUDING INSTRUCTIONAL TELEVISION, LANGUAGE LABORATORIES, FILMS, AND TEACHING MACHINES. THIS IS A REPRINT FROM PROGRAMMIERTER UNTERRICHT UND LEHRMASCHINEN, FINAL REPORT OF THE 1963 INTERNATIONAL CONFERENCE OF PROGRAMED INSTRUCTION, BERLIN, PAEDAGOGISCHE ARBEITSTELLE, 1964. (MS)