The system allows a student to randomly select instructional lessons and also provides sound concurrently with the running of an application program. In one embodiment the training system includes an audio unit that incorporates a cassette recorder and includes a tutorial program operating within the...http://www.google.fr/patents/US5228859?utm_source=gb-gplus-shareBrevet US5228859 - Interactive educational and training system with concurrent digitized sound and video output
Interactive educational and training system with concurrent digitized sound ...
