Ключевые слова: access, apartment, black, building, business, center, checkin, code, concepts, control, copy, design, digital, door, doorknob, element, entrance, fittings, front, hall, handle, hole, home, hotel, house, key, keyboard, keyhole, keypad, knob, lock, mechanism, office, pass, password, privacy, residential, room, safety, screen, security, self, smart, space, system, technology, temporary, touch, wall, wireless,