In the 1970s, inexpensive electronic calculators, using microchips, displaced adding machines altogether. Calculating machines, which could multiply (and, sometimes, divide), met a similar fate. The ...

In the course of the 1970s, handheld electronic calculators transformed the way tens of millions of people did arithmetic. Engineers abandoned slide rules, business people gave up desktop calculating ...

At one point the Burroughs Adding Machine Company had around ninety percent of the calculator market. The company made a habit of buying other companies before they had a chance to become real ...