This page mentions the EHR used by the U.S. Department of Veterans Affairs, known as VistA[0], developed using MUMPS. Interestingly, the source code for VistA

This page mentions the EHR used by the U.S. Department of Veterans Affairs, known as VistA[0], developed using MUMPS. Interestingly, the source code for VistA has been obtained via FOIA requests and so the code is available in the public domain[1]. There are now forks of VistA, like OpenVista. At one point we had to argue with Github to support syntax highlighting for M/MUMPS: https://github.com/github/linguist/pull/148 https://github.com/github/linguist/pull/148 [0] https://en.wikipedia.org/wiki/VistA https://en.wikipedia.org/wiki/VistA [1] https://en.wikipedia.org/wiki/VistA#Usage_in_non-governmental_hospitals https://en.wikipedia.org/wiki/VistA#Usage_in_non-governmenta...