Authors

MASS is the work of physicists from Quantum Sensors Division of the NIST Boulder Labs and the University of Colorado Physics Department, with substantial contributions from:

• Joe Fowler, project director
• Galen O'Neil, co-director
• Dan Becker
• Young-Il Joe
• Jamie Titus
• Joshua Ho
• Many collaborators, who have made many bug reports, bug fixes, and feature requests.

Major Versions

• MASS version 2 was begin in August 2025. It is still changing rapidly, in alpha status. Find it at https://github.com/usnistgov/mass2
• MASS version 1 was begun in November 2010. Bug-fix development continues. Find it at https://github.com/usnistgov/mass