As a 1980s child the change/evolution of portable audio has been incredible. From cassette Sony walkmans to minidisc to digital audio players. The storage capacity and physical size changes since the 1980s have been incredible. Now your entire music library can be stored on a finger nail sized SD card compared to piles and piles of cassettes, records/vinyl and CDs.<br />...<br /><a href="https://www.youtube.com/watch?v=SNgL43NipN4" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=SNgL43NipN4</a>