There have been plenty of iconic gadget releases throughout the years, but none are quite as legendary as the Sony Walkman.

Sony and a few other manufacturers were able to produce Walkmans that were barely bigger than a cassette tape itself.

A 1/8" inch, analog audio tape format that was widely used ... directions or the user manually removes the cassette and flips it over. In 1979, Sony introduced the Walkman, a small, lightweight ...