BAE Systems is a British global defense, security, and aerospace company and the largest defense contractor in Europe; it is one of six prime contractors to the US Department of Defense. For reporting purposes, the company has five operating segments: electronics systems is the group's US- and UK-based electronic warfare systems; the cyber, security, and intelligence segment supplies intelligence and security solutions to the US government; platforms and services manufactures combat vehicles and munitions and performs ship repair services to the US Defense Department; the air segment includes BAE's share of US and European air programs as well as its businesses in Saudi Arabia and Australia; and the maritime segment comprises UK land- and marine-based activities.