Well, since this is Computer Architecture....How does a computer work, anyway?
The first step is to turn on the computer and start the boot up process. The process starts with the ROM (read only memory) telling the BIOS that it is time to run the operating system (OS) and the rest of the components, and to perform a memory check. The OS is really important because it interprets the software programs so that they are understandable to the user.
Here is a site that offers more detail on the boot-up process:
http://www.selfgrowth.com/articles/SandyTran1.html
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