Audio-visual equipment used in manufacturing facilities for meetings, training, quality control presentations, and safety education. Includes projectors, screens, laser pointers, whiteboards, flip charts, microphone systems, etc. Focuses on commercial-grade equipment capable of clear viewing and listening even in noisy factory environments, supporting both portable and fixed installations. Features specialized functions for documentation during ISO certification, improvement proposal presentations, and technical education with drawings and data display. Excludes simple office supplies and personal devices, limited to commercial equipment for multi-person information sharing purposes.