[jennyp]

LOL!! (I do have a slide rule collection :)) My fav is my K&E Log Log Duplex Decitrig.

Nothing beats The Addiator.

[Scully]

Cool! My grandparents had something very similar, and I loved playing with it as a child. Ah, memories... :)

[RadioAstronomer]

Nothing beats The Addiator.

A slide rule certainly does not. (You cannot add using a "slip stick") That was one of the few chuckles I got during the movie "Apollo 13." They were adding numbers using their slide rules. :)