Dictaphone

In 1947, The Dictaphone company replaced the wax cylinder storage media they had used since Alexander Graham Bell started the company. They introduced a new mechanically etched Lexan belt named Dictabelt which was much more permanent. IBM introduced magnetic tape in the early fifties and the Dictaphone company used it alongside their mechanical system.

 Somewhat surprisingly, the company is still around today recording in the medical and legal fields, presumably without the wax cylinders...