TIL of Qube, a cable TV system in the 1970s that let viewers interact with the shows.

https://en.wikipedia.org/wiki/Qube_(cable_television)
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1q9mm5d/til_of_qube_a_cable_tv_system_in_the_1970s_that/