From 1949—Dictaphone Time-Master Dictation Machine

The post-World War II Dictaphones recorded by cutting grooves in a plastic “Dictabelt”, which could be flattened and sent through the mail in a regular envelope. Because the mechanical recording was considered too difficult to alter, testimony recorded on a Dictabelt was, unlike magnetic recordings, admissible in court in many jurisdictions. In the late 1970s, faced with competition from IBM dictation machines that recorded on a magnetic belt and allowed backspacing to correct errors, the company introduced magnetic recording machines, initially using the regular Philips Compact Cassette, and later smaller cassettes suited for portable machines.


Of course, nowadays, dic-ta-phone selfies have taken on whole new meanings, eh?

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