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. History ADS Group Limited was incorporated on 11 September 2009 as a private, limited by guarantee, no share capital company registered in the United Kingdom with company number 07016635. It was formed from the merger of the Association of Police and Public Security Suppliers (APPSS), the Defence Manufacturers Association (DMA) and the Society of British Aerospace Companies (SBAC). Activities ADS activities are focussed on supporting UK manufacturing and its industries supply chains, contributing to policy debates of importance to its industries, encouraging investments in technology and innovation, supporting business development, and enhancing the profile of its sectors. Its current published priority issues are around developing industrial strategy, productivity supply chain improvements, public procurement, and delivering net zero carbon by 2050. Farnborough International Limited, which runs the Farnborough Airshow, is a wholly owned subsidiary of ADS. ADS also encompasses the British Aviation Group (BAG). The organization participates in joint initiatives between industry and Government, including the Aerospace Growth Partnership and Defence Growth Partnership. It leads the National Aerospace Technology Exploitation Programme (NATEP), supported by funding from the Aerospace Technology Institute, aimed at helping UK supply chain companies develop innovative technologies. ADS is the largest member and contributor to the Aerospace and Defence Industries Association of Europe (ASD), the trade association representing Aerospace, Defence and Space in Europe. It publishes a quarterly magazine covering its four sectors, ADS Advance, and annual economic outlook reports on the UK aerospace, defence and security sectors. Events ADS coordinates UK Pavilions for UK companies exhibiting at international shows such as Paris Air Show and Singapore Air Show. The 2017 Paris Air Show saw 88 UK companies exhibiting in the UK Pavilion, while 150 companies exhibited in the 2017 UK Pavilion at DSEI. It also runs the annual United Kingdom Aerospace Youth Rocketry Challenge, a competition for secondary school student teams. The UK national champions compete in the International Rocketry Challenge against winners of the US, French and Japanese competitions. The International Rocketry Challenge final is held