“This was probably the world’s first portable compact-disk player. Introduced in 1967 by Philco-Ford, “Hip-Pocket” records were less than 4 inches in diameter and flexible enough to carry in your pocket without damage. Despite available titles from a number of major artists including the Beatles, the idea was an instant flop.”
– Professor Oleson’s Museum of Obsolete Technology
(via “The world’s first portable compact-disk player” « How to be a Retronaut)
The Committee to Nuke Elysium 