RetroTech: Recordable Paper - The 3M Sound Page
19:01
Show 'N Tell - 1960s Children's Multimedia System
27:11
The 3-in-1 oddness of the Triplecorder
31:45
This small CRT monitor is less than 2" thick
17:58
Software on Paper - 1985 Cauzin Softstrip
18:47
Automatic Record Changers: We used to like them
34:51
How I built a Mechanical Calculator
14:24
Space age audio - fifty years on
19:38