Any application that allows the participants at distant locations to communicate with each other; may indicate two-way video and two-way audio; one-way video and two-way audio through a normal telephone call placed to the origination site; asynchronously (not in real time) as through computer conferencing such as an electronic mail system; or through interaction with a teaching machine such as a glossary/43 computer which is programmed to respond to the user with messages on the screen, voice or other sounds to indicate that an answer is right or wrong.
The active participation of the user in directing the flow of the computer or video program.
