Sunday, December 2, 2012

Computer O/S Shutdown


How does a computer operating system shutdown itself in abstract sense?

Starting process of an operating system with the help of boot loaders, etc is clear.

But how does self-shutdown (up to electricity cut-off) possible without external help?
(question is not about Trigger as a Click or Automatic Shutdown)
(question is not about go to start > click turn off the computer, etc)
(question is not about close programs, close drivers, etc)

Can you explain shutdown process in abstract sense?


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