Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Projects/Programs

Displaying 1 - 5 of 5

International System of Units (SI)

Ongoing
The International System of Units (SI) provides definitions of units of measurement that are widely accepted in science and technology and which set measurement

Precision Measurement Grants Program

Ongoing
Since 1970, the National Institute of Standards and Technology (NIST) has awarded Precision Measurement Grants for significant research in the field of

Quantum Physics Theory

Ongoing
Theoretical work relevant to the determination of values of the fundamental constants, tests of bound-state quantum electrodynamics (QED), and methods of