Cleanroom technology is central to high tech manufacturing. Cleanroom, in manufacturing and research, is a dust-free working area with strict temperature and humidity control. This is of vital importance in the manufacture of equipment sensitive to environmental contamination, such as components for electronic and aerospace systems. A typical clean room has an atmosphere-control system that rigidly regulates temperature and humidity and bars entrance, by means of filters, of all but minuscule contamination. Daniel Holbrook of Marshall University, traces the origins of the cleanroom in his article 'Controlling contamination: The origins of clean room technology'.