Introduction to The Comptometer
Welcome to our comprehensive guide on The Comptometer. In this video we take a look at my favorite calculator
The Comptometer Comprehensive Overview
A visual explanation of how I gave a 10 minute talk at the Gathering for Gardner 12 conference in 2016: "Before electronic computers and calculators, there ... This adding machine was invented by Dorr FELT in 1885 and patented in 1887. Very successful trough several decades up to the ...
Demo Usage of How to Use the Comptometer
Summary & Highlights for The Comptometer
- The 100 year old
- The Comptometer
- In this video I show how to use
- This is a mechanical calculator,
- Neill, founder and MD of CIS, has this wonderful piece of old tech in his home office! This is
In summary, understanding The Comptometer gives us a better perspective.