The correct answer is: B. Oughtred.
The slide rule is a mechanical analog computer for performing multiplication and division. It was invented in the early 17th century by William Oughtred. The slide rule is a handheld device consisting of two rulers, one with a fixed scale and one with a movable scale. The scales are marked with numbers, and the user slides the movable scale along the fixed scale to perform calculations.
The slide rule was a popular tool for engineers and scientists for centuries, but it was eventually replaced by electronic calculators. However, the slide rule is still used by some people today, particularly those who work in fields where accuracy is important, such as engineering and astronomy.
Babbage was an English mathematician and inventor who is considered to be one of the fathers of computer science. He is best known for his work on the Analytical Engine, which was a mechanical computer that could be programmed to perform any mathematical operation.
Pascal was a French mathematician, physicist, and philosopher who is best known for his work on probability theory and the development of the first mechanical calculator.
Napier was a Scottish mathematician and astronomer who is best known for his invention of logarithms. Logarithms are a way of representing numbers as a power of another number, which makes it easier to perform calculations.
E is none of the above.