The only maker that still produces "classic" slide rules is the Japanese maker Concise. ... Made by various companies (e.g. Jeppesen, ASA), this simple and elegant device used by pilots for various flight calculations can also do basic multiplication and division on the circular slide rule portion.

Does anyone still manufacture slide rules?

Though they're no longer produced, the company still stocks around 1,200 or so and occasionally gets an order for some. Why would anyone still want to buy a slide rule, when inexpensive calculators are so readily available? According to Haase, slide rules are better suited to some functions than are calculators.

Who develop slides rules?

The slide rule was invented by William Oughtred in the 1600's, but only began to be widely used in the mid 1800's after a French artillery officer named Amedee Mannheim developed a version that became popular among engineers. By the early 1900's engineering students in the US were commonly taught to use slide rules.