Computer software, namely, scalable software application for operating digital signage networks of any size for the management of all advertising business activities, including network operations, advertising sales, booking, scheduling, monitoring ad campaigns as well as providing proof of play reports; Computerized networks comprised of electronic signs; Digital sign boards; Electronic billboards, light emitting diode displays, panels, namely, electronic displays; Signs, namely, digital signs; Digital displays, namely, plasma screens, Liquid Crystal Displays and Cathode Ray Tube displays; Circuit boards, namely, electrical circuit boards; Computer hardware; Video monitors; Computer peripherals; Computer hardware and software used to automatically collect data from sensors that measure real time audience information; Downloadable computer software used for real time tracking of facial reactions, face detection, people tracking, object tracking, video analytics for media displays, retail and public environments; Cameras and monitors; Providing on-line downloadable computer software for real time tracking of facial reactions, face detection, people tracking, object tracking, video analytics for media displays, retail and public environments