Comptometer - Wikipedia
The Comptometer was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887.
Comptometer Explained – Everything You Need To Know
2023年7月27日 · What is the comptometer? The comptometer was the first commercially successful key-driven mechanical calculator. How does a comptometer work? The computation is carried out by pressing keys. The comptometer’s keyboard is comprised of columns each presenting a place or power of ten. The lever inside the …
Comptometer Explained – Everything You Need To Know
2024年3月26日 · The comptometer was the first commercially successful key-driven mechanical calculator and a revolutionary device that transformed bookkeeping, accounting and many other business processes for nearly a century.
Comptometer for sale - eBay
Get the best deals on Comptometer when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands | affordable prices.
Operating a "Comptometer" - Vintage Calculators
"How the Comptometer works" - animated explanations of the Comptometer mechanism. "The Comptometer Super Totalizer, a mechanical calculator" - shows the basic operation of a Comptometer. "Comptometer Arithmetic" - addition, subtraction, multiplication and division.
Definition of Comptometer - PCMag
A mechanical calculator that was made from 1887 to the mid-1970s. The Comptometer was the first push button calculator and also the first calculator to achieve commercial success.
Comptometer - Vintage Calculators
The Comptometer was the first successful key driven adding and calculating machine. "Key driven" means that just pressing the keys adds the numbers entered to the total - no other action is required - so it is very quick for adding long lists of numbers. The basic function of the Comptometer is addition.
Comptometer - Jaap's Mechanical Calculators Page
2015年5月1日 · The table below lists all the Comptometer models, with their most prominent characteristics. Some models (such as B and C, or H and J) are very hard to distinguish except by serial number. The serial number limits are based on observed examples, so machines with numbers outside these ranges may exist.
Comptometer
2023年2月25日 · The Comptometer, an early mechanical calculator, was a significant development in the history of computing, and its design evolved dramatically over the years. The Comptometer was invented by Dorr Eugene Felt in 1887, and it initially came in a wooden box design called the "woodie."
comptometer - Maple Ridge Museum
Besides being an incredibly fun word to say, the comptometer was the first commercially successful mechanical calculator, patented in 1887. Beginning with ‘Model A’ each design introduced new and improved features to make the comptometer faster and more reliable.
- 某些结果已被删除