World’s Largest Slide Rule

352 feet long.

It has been a generation since most people even thought about a slide rule, but Fort Worth became home Wednesday to the biggest one there is.
It measures 352 feet long, weighs 300 pounds and takes three men to slide.
Skip Solberg and Jay Francis said it will calculate to “six significant digits,” which apparently is a good thing. Some other engineers smiled and nodded when hearing of the “significant digits.”

(via Make:blog)