Ключевые слова: access, arrival, background, blank, business, businessman, card, close, code, control, design, door, electronic, enter, entrance, entry, equipment, hand, holding, home, hotel, house, identification, isolated, key, keycard, keypad, light, lock, man, modern, nfs, object, office, open, plastic, protection, room, safety, secure, security, sensor, service, system, technology, travel, trip, unlock, using,