Welcome!
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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. -
As of December 31, 2024, ISRM will no longer function as a 501(c)3 and any donations in 2025 will not be tax deductible. -
ISRM Advisory Board of Directors.
| KEEP ISRM FREE! |
ISRM will no longer be accepting physical gift of slide rules, and that parts of the collection is in the process of being deaccessioned. See Donation Policy
Visit What's New! for the latest additions to the galleries and changes to the website.
Public Displays and Exhibits News for Friends of the Museum
2024 Annual Fund Raiser
ISRM needs to raise a minimum of $2000 annually, necessary for its programs and ongoing web maintenance. All donations are tax deductable. In our 21th 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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