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Hi! This is Mike Callahan, Dr. File Finder and welcome to your butterscotch.com tutorial on what is POST.
Yes, POST is rather large stick or log that’s stocked in the ground but that’s not the kind of posts we mean. You’ll hear the term around the internet become very common and what it stands for is power on self test. So, when you turn on your computer and your computer runs through a list, checking your RAM, just checking your disc drives, just checking peripheral devices, Power-on Self-test POST, just checking the BIOS. If you look here you can see that the principal duties of the main BIOS during POST are to verify the integrity of the BIOS, find size and verify the system main memory, initialize system buzzers, pass control over to the BIOS, provide a user interface, and so on. And once the Self-test has been completed, then the system goes out to boot and start the operating system.
So for example, if you turn on your computer and you’ll get an error, the keyboard error. The keyboard error was discovered during the POST or Power-on Self-test. So, this is the way the computer uses to check everything out before it hands off to the operating system. And that’s all there is to it.
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