ISRM

ISRM

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International Slide Rule Museum (ISRM) is the world's largest digital repository of slide rules

01/03/2026

As of January 1, 2026 The entire ISRM archive, aka the Michael Konshak slide rule collection and library, has been has been shipped, in its entirety, from Colorado to Long Island, New York into the care of the new ISRM Custodian, Kurt Dietrich for preservation. It was becoming difficult for the curator to manage the day-to-day operation of the physical museum, which involved making spare parts and shipping slide rules and books that people wanted to adopt.. Please welcome, Kurt Dietrich to the ISRM family.

When Kurt is able, sometime in February 2026 he will take on the burden of doing many of the services of providing parts, slide rules and manuals to fellow collectors. Kurt has total ownership and autonomy on how to manage the collection. Donations of physical slide rules will need to be sent to the Custodian.

The 501(c)3 Non-Profit and ISRM museum website and digital galleries will still continue to be maintained and updated as has been done for 23 years by Michael Konshak, the ISRM Curator in Louisville, Colorado. Tax-deductible donations used to support the website will continue to be accepted during the 2026 tax year.

The ISRM collection on metal racks is shown loaded into a 16 foot x 8 foot container and will arrive in New York on February 2, 2026.

Meet 09/23/2025

I pulled the Wednesday and Saturday video meeting links temporarily as there is no one who is able or willing to host the meeting without having an agenda or topic presentation.

However, its still an active Google meet code, so if toy wish to show up ay 9:00 am Mountain standard time, you find another collector lurking in the wings wanting to talking to you.

Meet Real-time meetings by Google. Using your browser, share your video, desktop, and presentations with teammates and customers.

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Louisville, CO