25% OFF on Slide Rules CLICK HERE for the list |
Special Sales Promotion on Adopting our Duplicate Slide Rules.The ISRM board of advisors (from our weekly video meetings, which is open to everyone) has authorized me to offer a 25% discount off the suggested fees on all our duplicates during the month of September. Hundreds are available for adoption. This fund raiser supports the $2000 that is necessary for ISRM's annual operating expenses for its schools loaner program, archiving expenses and ongoing web maintenance.
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International Slide Rule Museum (ISRM)ISRM is the world's largest free digital repository of all things concerning slide rules and other math artifacts.
ISRM is an IRS 501(c)(3) (A57 - Science and Technology Museums) non-profit corporation through the State of Colorado.
Colorado ID Number 20181884948, IRS EIN 83-2486423. - ISRM Advisory Board of Directors.
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KEEP ISRM FREE! Donations are tax deductable |
2022 was the 400th anniversary of the slide rule as described by Willaim Oughtred. 2022 was also the 50th anniversary of the HP-35 Electronic Slide Rule Calculator.
Visit What's New! for the latest additions to the galleries and changes to the website.
![]() Slide Rule LibraryScans of slide rule manuals and text books are organized into one of 15 areas:
Additional ISRM Galleries Slide Rule ResourcesPreservation Project of Slide Rule Instructions from the ISRM Library![]() ISRM's Slide Rule Instructions Library Preservation Project available on Amazon With the help of many Friends of the Museum, is in its 3nd year of publishing reprints we have compiled, scanned and edited thirty-six 550-page volumes of all known brands, country or language. Every one of the 550 page volumes contains from 6 to 30 manuals and captures most of the popular models from each of the brands, and are available in paperback or hardcover on Amazon. which will print to order in 7 countries. The small royalty that we receive goes to support ISRM. This continuing project allows the handling of 50-120 year-old paper manuals and textbooks, prior to 1973 that were rapidly deteriorating from aging and the elements. Download the Table of Contents of all the current Volumes. Public Displays and Exhibits News for Friends of the Museum
2023 Annual Fund Raiser - ISRM needs to raise a minimum of $2000 annually, necessary for its programs, exhibits,and ongoing web maintenance. All donations are tax deductable. In our 19th year of being on-line, we have 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. Note that ISRM is a 501(c)(3) non-profit so cash donations are tax deductable. Thank you for your welcome support and kind consideration!
Students from the Collège André-Grasset in Montreal, Canada 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: International Slide Rule Museum Contact: ![]()
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![]() Slide rules for sale in the Gift Store Proud Member of ![]() ![]()
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