Twilight of the gods — 20th century
The 20th century is a time of ubiquity and decline of mechanical calculating machines. In the first half of the century thousands of companies, primarily in Germany and the USA, manufactured millions of mechanical calculators, cash registers, accounting machines, etc. In the second half, however, especially after the 1960s, when the first electronic calculators were launched, the mechanical calculators started their unavoidable journey to the museum collections.
| Alexander Rechnitzer (1900) | Hopkins (1902) |
| Ryoichi Yazu (1902) | Dalton (1902) |
| Wales (1903) | Mathias Bäuerle (1903) |
| Emory Ensign (1904) | Gauss (1905) |
| Victor (1918) | Curta (1948) |
The image featured at the top of this post is ©Hydrargyrum, CC BY-SA 3.0, via Wikimedia Commons.