The Frequency Control Committee fosters exchange on advances in research and development in the field of time and frequency. This encompasses the development and characterization of oscillators, sensors, frequency standards and atomic clocks, in the microwave and optical spectral domains. Important applications are the realization of timescales and time and frequency transfer for a wide range of uses in telecommunication, navigation, network synchronization and also in fundamental research in fields like precision spectroscopy and radioastronomy. The fact that time and frequency can be measured so precisely, far better than any other physical parameter, represents a technological asset of great importance. Developments like digital synthesis and optical frequency combs have pushed the limits of control and accuracy into new domains. A core activity of the society is the annual International Frequency Control Symposium, which is organized every second year together with the European Frequency and Time Forum EFTF.