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In page Philips:

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Philips introduced the first combination portable radio and cassette recorder, which was marketed as the "radio recorder", and is now better known as the boombox. Later, the cassette was used in telephone answering machines, including a special form of cassette where the tape was wound on an endless loop. The C-cassette was used as the first mass storage device for early personal computers in the 1970s and 1980s. Philips reduced the cassette size for professional needs with the mini-cassette, although it was not as successful as the Olympus microcassette. The mini-cassette became the predominant dictation medium up to the advent of fully digital dictation machines.[citation needed] Philips continued with computers through the early 1990s (see separate article: Philips Computers).