- Physics Laboratory
 - Supports United States industry by providing measurement services and research for electronic, optical, and radiation technologies. - Time and Frequency Division
- Maintains the standard for frequency and time interval for the United States though the NIST-F1 Cesium Fountain Atomic Clock.
- Physical Reference Data
- Includes physical constants, and other data on spectroscopy, ionizing radiation and dosimetry, nuclear and condensed matter physics, and more.
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