
I thought I was the only person who actually recognised the systems. I started my life on the ICL 1900 series.
( , Thu 22 Dec 2011, 7:05, Reply)

Wasn't even founded until the late 60's
even I didn't start using the brown ones with the 8" floppies until the 80's.
You may have been using the Odhner Arithmometer in 1900 mind you. Which had similar functionality. (As I recall)
( , Thu 22 Dec 2011, 9:00, Reply)