Keywords: Atomic Clock024.jpg NIST-7 the seventh generation of atomic clocks at the National Institute of Standards and Technology and three of the researchers who spent seven years developing one of the world's most accurate clocks From left to right John P Lowe Robert E Drullinger the project leader and David J Glaze National Institute of Standards and Technology 1993-04-22 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Atomic clocks |