AeroVironment, Inc. is an American technology company in Monrovia, California, and Simi Valley, California, that is primarily involved in energy systems, electric vehicle systems, and unmanned aerial vehicles (UAVs). Paul B. MacCready, Jr., a designer of human-powered aircraft, founded the company in 1971. The company is probably most well known for developing a series of lightweight human-powered and then solar-powered vehicles. AeroVironment is the Pentagons top supplier of small drones — including the Raven, Wasp and Puma models. They have signed a strategic partnership with Lockheed Martin Corp to develop their 'Global Observer' to provide "persistent airborne observation". Among the vehicles the company built are: AeroVironment holds a five-year, $4.7 million IDIQ (indefinite-delivery, indefinite-quantity) contract from the U.S. Air Force Research Laboratory for the development of advanced propulsion technologies for UAVs. The contract also provides for specific technological tasks such as integration of solar cells into aircraft wings, electric motor efficiency improvement technologies, and development of hydrogen storage systems for aircraft.