Atomic physics sets the standard for stability and accuracy in precision frequency reference packages worldwide. Hydrogen, cesium and rubidium standards, and quartz oscillators have supported more military communications, satellite ground stations, and test & measurement applications than any other precision frequency references in the world. Advanced research, cutting edge electronics engineering, superior manufacturing, and integrated software design have resulted in precision frequency standards that deliver exceptional performance and unsurpassed accuracy, stability and reliability in the most challenging of environments.