“…In 1957 John and Valerie Graves founded the Medical Recording Service which made audio tapes available to general practitioners, and their system expanded steadily so that they now have a library of tapes and transparencies of interest to people in all branches of medicine, including medical students (Graves, 1971). Harden, Wayne, and Donald (1968) were among the first to use tape slide presentations in undergraduate medical education at Glasgow, and a library of tape slide presentations has been built up at the University of Newcastle‐upon‐Tyne for the same purpose (Amos, Duncan, Gilder, Hall, and Smart, 1969), some being produced at Newcastle and some being borrowed from other centres. Fletcher and Watson (1968) introduced audio tape as an instructional guide in pathological histology; Verbrugh, de Vries, and Noel Eastham (1971) have made tape slide sequences an integral part of the pathology course in Rotterdam; and Zollinger (1972) also has used tape slide teaching devices in general and special pathology.…”