An audio recorder uses a magnetic head that stays ... Between 1975 and 1977, both Betamax (from Sony) and VHS (from JVC) formats appeared and this led to the infamous format war in the 1980s.

Matsushita subsidiary JVC followed with VHS a year later. Betamax and VHS used different cassettes and recorders and required users to make a choice. Betamax is an example of a superior product ...