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The World Health Organization ( WHO) is part of the United Nations (UN), working on international public health, with its headquarters in Geneva, Switzerland. The WHO was established by the UN on April 7, 1948. In the previous year they had already started an epidemiology service. WHO World Health Day is celebrated on April 7.
A device controller is a system that handles the incoming and outgoing signals of the CPU by acting as a bridge between CPU and the I/O devices. A device is connected to the computer via a plug and socket, and the socket is connected to a device controller. Device controllers use binary and digital codes. An IO device contains mechanical and ...
