Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Taking Measure

Just a Standard Blog

Mary Theofanos

portrait of Mary Theofanos

Mary Theofanos is a computer scientist with NIST’s Material Measurement Laboratory where she performs research on usability and human factors of systems.  Mary is the project lead for the Public Safety Communications Research (PSCR) usability effort evaluating human factors and usability of PSCR technology. She is the program manager responsible for developing standards for usability.  She represents NIST on the ISO JTC1 SC7 TAG and is convener of WG 28 on the usability of software systems.  She is the principal architect of the Usability and Security Program evaluating the usability of cybersecurity and biometric systems.