Various materialssupport in pictures, audio files, video files, PDF files, HTML, dynamic webpages, rolling subtitles, live broadcasting, third-party data, etc. Flexible programs schedule and display. Convenient remote and local materials updating. Centralized and integrated control of terminals, e.g., scheduled startup/shutdown, brightness/volume adjustment, picture capture, etc. Multi-level organization management for materials, programs, terminals and user accounts, etc. Multi-level user management with different permissions authorized. 10-point interactive operation on screen