The Physical Measurement Laboratory (PML) is one of the major operating units of the National Institute of Standards and Technology (NIST). NIST has undergone a realignment. If you're familiar with the previous organizational structure of NIST, PML is comprised of all of the Physics Laboratory, most of the Electronics and Electrical Engineering Laboratory, and parts of the Manufacturing Engineering Laboratory, the Chemical Science and Technology Laboratory, and Technology Services. For more information, see What We Do.