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ISRM is expirementing with a new navigation look using drop-down menus. This is only a partial site.
Go to the official museum website at www.sliderulemuseum.com
Click the Slide Rule for Introduction,
Museum Mission Statement, and Donation Policies.
Visit What's New! for the latest additions to the galleries and changes to the website.
ISRM is best viewed on a desktop..Clear your browser cache often CTRL-F5
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Slide Rule Galleries
All slide rule specimens, scans, photos and ephemera are organized into one of 50 galleries; by major manufacturer, construction style, country/region, time period or application. BBRAND INDEX lists all the brands shown in the museum..
Slide Rule Library
Scans of slide rule manuals and text books are organized into one of 13 areas:
Addditional Slide Rule Resources
News for Friends of the Museum
| 6 donors
| 19.5% of goal - as of June 1 |
2017 Annual Fund Raiser - ISRM needs to raise a minimum of $2000 annually, necessary for its programs, exhibits,and ongoing web maintenance. In our 14th year of being on-line, we currently average almost 1 million hits/month with 60 GB of data being downloaded from 118 countries, all at no cost to you! There are no paid staff members, but we need help in keeping ISRM growing and on-line during these challenging times. In 2011 ISRM established a FRIENDS OF THE MUSEUM page to acknowledge its many supporters. You can become a TIER 1 FRIEND OF THE MUSEUM by your donation through Paypal or by check. You can also help by participating in ISRM's Slide Rule Rescue program where you can adopt slide rules. Thank you for your welcome support and kind consideration!
Mail checks or donated items to: Mike Konshak (ISRM Curator), 1944 Quail Circle, Louisville, CO 80027, USA.
2012 marked the 40th anniversary of the HP-35 'Slide Rule' Calculator
(and the beginning of the end of the slide rule industry by 1977).
The release of the Hewlett-Packard HP-35 occured on Febuary 1, 1972. the HP-35, named for the number of keys on the calculator, was the single most instigator of the demise of the slide rule as we know it, even though the introductory price was $395.00 or $4000 in 2012 money. Within months, Texas Instruments released the TI-2500 4-function calculator and the SR-10 slide rule calculator.
Visit ISRM's Gallery of Slide Rule Calculators from 1972-1977
Students from the Collège André-Grasset in Montreal, Canada using slide rules donated by ISRM. Click on the banner for more information.
Students from the University of Waterloo in Ontario, Canada created an exhibit for the annual Knowledge
Integration (KI-X 2011) exhibit using slide rules donated by ISRM. Click on the banner for more information.
Dr. Barbara Rooker of the Joplin, Missouri K12 School System, introduced students to slide rule math during 2009 using ISRM's free loaner program. Click banner for more pictures:
The original specimens and files found in this museum prior to 2005 were
donated to the Computer History Museum in Mountain View, California in for preservation
and display. Take time to visit CHM when you are in the area. ISRM continues to expand with replacements through the generous cooperation and donations of collectors and heritage donors from around the world.
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Modern Logo's depicting Slide Rules
USAF Test Pilot School Patch, Edwards AFB, California
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Joe Miner, Official Mascot of University of Missouri-Rolla, now the Missouri University of Science and Technology
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Purdue Engineer's Yell (1960's)
e to the x, dy, dx
e to the x, dx
cosine secant tangent sine
three point one four one five nine
square root, cube root, Btu
slipstick, slide rule, Yay Purdue
Contributed by Bruce Chelf,
Purdue Alumnus (The ISRM curator
subsitutes CSU for Purdue)
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U.S.S. Wayne E. Meyer COA. Slide rule shown on book
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Slide Rule Wallpaper
This wallpaper is a collage of many slide rules. It is 1240 x 1020, 582kb and I have almost every slide rule manufacturer and country represented. Save this file (Right-Click Save Target) and select it using for the background on your computer monitor. 'Right-Click' on your screen and select 'Properties', then 'Browse' to the file to change your wallpaper. I hope you enjoy it.
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Slide Rule Competitions
Gold: Werner H. Rudowski(center)
Silver: Jörn Lütjens (right)
Bronze: Klaus G. Krämer (left)
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The Deutschsprachigen Rechenschieber-Sammler RST (German speaking Slide Rule Collectors) held its 23rd annual meeting in Altona (Hamburg) Germany on April 14, 2012 and hosted the 2012 'truly'
International Slide Rule Championships, the first one to be held in Europe. 15 of the 40 slide rule collectors, 5 countries (Germany, Switzerland, The Netherlands, Luxembourg, and Finland) volunteered in participating in the International Slide Rule contest (Continental European) 2012, which was performed for the first time. The main profession of the contesters were (retired) engineers, 2 active pilots, and teachers. All the participants received an ARISTO Darmstadt 967 slide rule and had to solve 10 problems within 30 minutes.
The champion, Werner H. Rudowski won with with 10 (all) solutions solved followed by Jörn Lütjens with 9.5 solutions and Klaus G. Krämer with 9 solutions. Congratulations all!
Any collector group, school or engineering association are
invited to host an ISRC contest.
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ISRM is administering the International Slide Rule Championships.
Any collector group, school or engineering association are invited to participate. Problem sets provided by
ISRM as well as the Medals to be awarded to the local champions, FREE! The first innagural contest in was Rose Suarez's Mathematics and Research Class in Half Hollow Hills, NY. (on Left). Kristen Fouss's Pre-calculus class at Anderson HS in Cincinnati, Ohio also had champions (on right).
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Copyright © 2003-2017
International Slide Rule Museum
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Proud Member of
1550-1617
John Napier
Invented the Logarithm in 1614
1574-1660
William Oughtred
Inventor of the Slide Rule
1831-1936
Victor Amadee Mannheim standardized modern scales
c1890
DUPA (Aristo) Class Germany
c1900
Englewood (NY) High School Students
c1905
IIT Classroom
1909
IIT Elect. Engineers
1934
Iowa State SR Class
1941
IIT Engineering
1942
Purdue Aeronautics
1950 African-American Students.Prarie View, TX. Texas A&M
1952 Edwards AFB
Test Pilot School
1954 Hamburg, Germany
1957 Robert Herndon, Aircraft Engineer (Life Magazine)
1965 NCF Math Class
1970Colorado School of Mines
1976 Joe Pasquale (right) Weehawken HS, NJ now a Professor at UCSD
1980's "Startrek" TV Re-Runs
Present Collector
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