ADS Group Limited, informally known as ADS, is the trade organisation representing the aerospace, defence, security and space industries in the United Kingdom. It has more than 1,000 member companies across its sectors, including some of the UK's largest manufacturers, like Airbus, Rolls Royce, BAE Systems, Meggitt PLC and GKN. Its subsidiary Farnborough International Limited runs the biennial Farnborough Air Show, one of the world's biggest air shows, and other events.