1. Acid-base equilibrium slide-rule

2. I'd be unfaithful to my wife every night with vice presidents, boards of directors, slide-rule accountants...

3. 26 All of them will make either a slide rule or an abacus as a way of presenting how number sets work.

4. Carrier has been innovating cooling technology since 1881, when Willis Carrier invented the slide rule, a circular calculating instrument that was the foundation of the invention of modern air

5. The abacus was an instrument used by Greeks and Romans for arithmetic Calculations, preceding the slide-rule and the electronic calculator, and consisted of perforated pebbles sliding on iron bars

6. Originally, the information processing was almost exclusively related to arithmetical problems, but modern computers are used for many tasks unrelated to mathematics . Within such a definition sit mechanical devices such as the slide rule , the gamut of mechanical calculators from the abacus onwards, as well as all contemporary electronic computers.