[Oughtred’s] device was a circular slide rule and one of his students, [Richard Delamain], also claimed to have invented the device. Both men accused the other of stealing it. Scholars now think ...

An early computing device invented by Reverend William Oughtred in London in the 17th century. Primarily for multiplication and division, the slide rule has two stationary sets and one sliding set ...

Before there were apps for tablets and smartphones, before mathematics education software was easily installed on personal computers, before electronic calculators entered professional practice and ...

"so I invented BENNY'S SLIDE GUIDE. My design would make the process easier and less frustrating. It also would reduce hand strain." The invention provides an effective way to keep a firearm's ...

If you know how a slide rule works, you’ll find you already ... It doesn’t help, either, that decimal points hadn’t been invented yet. What was really impressive, though, was the disk ...

This merger added a range of PIC slide rules to their range. the plastic slide rules where introduced in the 1960s and in 1967 the company became British Thornton. The slide rule was the evelution ...

Slide rules such as this 20 inch example were the principal instruments for mathematical calculation until the development of the electronic calculator in the 1970s. It played an incalculable role ...