find non-electronic digital devices - Tutespark wk3

I have got a task like this:

The Tutespark for week 3 is to find at least 3 (three) examples of digital devices that are not electronic. Preferably they should be communication technologies

In the lecture, we learnt about some old technologies. This is the one of the examples that the teacher explained.

Pianola!





What a machine! I have never seen a real one.
But I remember seeing this. Beautiful street organs.





I don't remember when and where, but I used to see a beautiful huge street organ larger than this one, hand operated by an old man. It was like a dreaming time to stand in front of this instrument for tiny kids like me. The sound, the design of the organ, everything was just beautiful.


And this one. Old cash register.

What a beautiful design! If I was a thief in this era, I would have stolen the register itself, and left the money.



These are all transforming code=digital information into the machine functions. Therefore, they are the analogue digital devices.