The paper commences with a short description of the current methods of exercising air traffic control and attempts to bring out those problems, both current and future, which might be solved or eased by the application of electronic data processing and improved methods of data transfer.A review is then made of the new techniques and systems most likely to satisfy these requirements, and the manner in which the techniques described in the associated papers fit into the overall picture. Some indication is given of the extent to which these techniques have been or are being evaluated. The techniques examined will be those associated with the transmission of data, its storage, processing and display.