Using A Slide Rule
| Field | Mathematics, Physics |
| Went Obsolete | Early_Mid 1970s |
| Made Obsolete By | Scientific Calculators |
| Knowledge Assumed | Midlevel math and science background required to use it effectively |
| When useful | College and professional math, physics, engineering, etc calculations |
The Museum of HP Calculators
Follow link to see instructions on how to use and photo of Slide Rule plumber seattle
Some sliderules are still available in antique shops.
NOTABLE EXCEPTION: Pilots continue to use a variant of the slide rule called the circular slide rule http://en.wikipedia.org/wiki/Slide_rule for instant trip calculations involving fuel, time and distance, etc. san francisco plumber
