The arms industry, also known as the defence industry, military industry, or the arms trade, is a global industry which manufactures and sells weapons and military technology. Public sector and private sector firms conduct research and development, engineering, production, and servicing of military material, equipment, and facilities. Customers are the armed forces of states, and civilians. An arsenal is a place where arms and ammunition – whether privately or publicly owned – are made, maintained and repaired, stored, or issued, in any combination. Products of the arms industry include weapons, munitions, weapons platforms, military communications and other electronics, and more. The arms industry also provides other logistical and operational support.