We learned how to use the slide rule when I was in school. Thanks to technology, I assume hardly anyone uses it anymore. In the US, Keuffel and Esser was the first company to make them. They stopped in 1975.
We learned how to use the slide rule when I was in school. Thanks to technology, I assume hardly anyone uses it anymore. In the US, Keuffel and Esser was the first company to make them. They stopped in 1975.