electrical and electronic apparatus and instruments, namely, back planes, printed circuit boards, data processors, computer servers, computers, computer disc drives, computer monitors; monitoring and control instruments, namely, sensors for monitoring and controlling the temperature, humidity, access, smoke, pressure, speed; thermometers, thermostats, temperature pressure gauges for monitoring and controlling the temperature, pressure, speed and for controlling the temperature, pressure, speed of electrical fans; and chassis and enclosures for the aforesaid goods, and parts therefor, namely, blanking plates for enclosing open front areas in chassis and enclosures; electronic data-processing racks in the nature of cabinets made of metal for receiving electrical and electronic apparatus, instruments, chassis and cooling systems; server racks in the nature of cabinets made of metal and for receiving servers; electrical supply apparatus for electronic data-processing rooms, namely, power packs in the nature of batteries, electrical cables, electrical sockets, switches; electronic data-processing servers in the nature of communication servers, blades servers, pizza servers; power supply lines, namely, electrical power strips, electrical connectors and power rails, namely, enclosures for power wires, electrical cables; computer hardware in the form of data transfer lines, namely, bus lines, computer busses; data processor components, namely, data bus interface circuits, electronic communications components, namely, data links between back plane and circuit boards, computer bus connectors; standby battery supply equipment, namely, uninterruptible energy and electrical power supply units; electronically based monitoring system comprised of sensors and controllers for monitoring and controlling access, humidity, and temperatures inside rooms; control systems comprised of sensors and controllers for controlling access, humidity, and temperatures in computer centers