Slide rules can perform the basic arithmetic operations of addition, subtraction, multiplication, and division, but they can also be marked for computing with logarithms, square and cube roots, ...

It is important to keep a slide rule clean so that grime doesn’t get under the cursor where it is more difficult to clean and interferes with the operation of the rule. Be careful putting your ...

Primarily for multiplication and division, the slide rule has two stationary sets and one sliding set of numbers in the center. To multiply, numbers are added; to divide, numbers are subtracted.

The 10" slide rule shown here (P271 Log Log) had an accuracy of 3 decimal places. It's operation was efficient and the Pickett-brand slide rules were carried on five Apollo space missions ...

We like mechanical calculators like slide rules, but we have to admit that we had not heard of the Ott Derivimeter that [Chris Staecker] shows us in a recent video. As the name implies ...