8 track was created in 1964 by a consortium led by Bill Lear of Lear Jet Corporation, along with Ampex, Ford, Motorola and RCA Victor Records. **
Added to answer My research shows: The 8-track tape has roots that extend into the
motion picture industry. Endless loop motion pictures were made from
the 1920s on for advertising or other special purposes. With the
appearance of inexpensive reel-to-reel tape recorders in the late
1940s, several inventors adapted the endless loop motion picture idea
for use with the new German-style plastic recording tapes. Of these
inventors, only one, William Powell Lear, gets much attention Regards,
Jeffery Williams jwilliamsoh
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usually 1/8
Samuel Watson invented the stopwatch. He did this in the year 1821. He invented it because he wanted something that could keep track of the time it took for something or someone to perform something.
Sorry here is a better answer: Single-sided, 8 sectors/track: 160 KB (1981) Single-sided, 9 sectors/track: 180 KB (1983) Double-sided: 360 KB (1983) High-Density: 1.2 MB (1984)
track sector cyllnder spiral
Tim Westergren invented Pandora.