We are some of the original developers of Interlisp-D, Xerox Common Lisp, and systems built on those, joined by volunteers from the Lisp and open source communities.

• You can see our ongoing activity in our 2023 Annual Report and other information on our website and GitHub information.
  You can help in many ways (many not requiring knowledge of programming or Lisp) -- see Get Involved.

Financial contributions help with ongoing expenses for running Medley in the cloud, Zoom, and other operational expenses; larger donations can help us fund students and consultants to help with larger tasks. Even small donations signify support.

Interlisp.Org is a 501(c)3 California non-profit corporation; donations may be tax deductible in the U.S.
Our EIN is 87-2528093; Ron Kaplan is the treasurer.
Donations may be made here as GitHub sponsor. We also accept donations sent via PayPal to paypal@interlisp.org.