slide rule
slipstick

At the age of 10, she was using a slide rule.

Inside, Tom was hard at work with a slide rule.

It is time to give thanks and put away the slide rule.

You don't need a slide rule to figure it out.

More necessary, you can get along without a slide rule.

I should really have to sit down and work it out with a slide rule.

Well, we know that a slide rule is nothing but adding.

It almost feels as if the slide rule has returned.

Also, by the end of the 1970s, the slide rule had become obsolete.

Mary Lou worked out the resu1t on the slide rule.