Uploaded December 2021 | Updated September 2026, 1 hour ago
I gave a 10 minute talk at the Gathering for Gardner 12 conference in 2016:
"Before electronic computers and calculators, there were mechanical calculating machines. The Comptometer was one of the most widely used calculating machines, used all around the world for almost 80 years. It quietly changed the world, yet is almost forgotten today."
This video was a practice run I made to see if I got the timing about right. The actual talk was filmed, and can be found here:
youtube.com/watch?v=Q2G-383ij8A
The powerpoint presentation can be found here:
jaapsch.net/g4g/index.htm
For more information about the Comptometer and the other mechanical calculators in my collection, visit my site:
jaapsch.net/mechcalc
I gave a 10 minute talk at the Gathering for Gardner 12 conference in 2016:
"Before electronic computers and calculators, there were mechanical calculating machines. The Comptometer was one of the most widely used calculating machines, used all around the world for almost 80 years. It quietly changed the world, yet is almost forgotten today."
This video was a practice run I made to see if I got the timing about right. The actual talk was filmed, and can be found here:
youtube.com/watch?v=Q2G-383ij8A
The powerpoint presentation can be found here:
jaapsch.net/g4g/index.htm
For more information about the Comptometer and the other mechanical calculators in my collection, visit my site:
jaapsch.net/mechcalc
