9 Downloadable computer application software for mobile phones, namely, software for management of digital billboards, booking advertisements on digital billboards, and scheduling advertisements on digital billboards; Downloadable computer software for management of digital billboards, booking advertisements on digital billboards, and scheduling advertisements on digital billboards; Downloadable mobile applications for management of digital billboards, booking advertisements on digital billboards, and scheduling advertisements on digital billboards; Downloadable software for management of digital billboards, booking advertisements on digital billboards, and scheduling advertisements on digital billboards; Downloadable software in the nature of a mobile application for management of digital billboards, booking advertisements on digital billboards, and scheduling advertisements on digital billboards