Ключевые слова: 3d, alarm, background, building, business, cam, camera, cctv, communication, computer, control, device, digital, electronic, empty, equipment, firewall, guard, illustration, internet, laptop, lens, meeting, monitor, monitoring, network, office, online, pc, privacy, protect, protection, record, safety, screen, secrecy, security, software, spy, surveillance, symbol, system, technology, television, two, urban, video, watch, watching,