Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Birth of the Compact Audio Cassette

Philips compact cassette
Philips developed the Compact Audio Cassette in 1963. At the time, it was only one of several competing cartridge based formats designed to simplify tape recording. RCA had developed a magazine-style system in 1958, and several German companies began pushing to develop a standard.

Philips approached Sony Corporation in Japan after realizing that Japanese acceptance of the new format would vastly improve the chances of success. After some hardball negotiation, Philips agreed to license the system to Sony without royalties. In fact, by 1965 Philips had opened the format up to other manufacturers free of charge.

The format initially offered fairly poor fidelity and was marketed for voice recording and dictation. Technology improved quickly, and advances in noise reduction technology, its ability to play stereo tapes, and new tape formulations soon assured high-quality sound from the compact format.

Incidentally, Philips went on to co-develop the Compact Disc.

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