Microsoft Corporation Staff, IT Professional Staff - Microsoft Windows 2000 Server Operations Guide

When you turn on or restart a computer, it begins a POST routine. The POST routine determines the available amount of real memory and verifies the presence of required hardware components, such as the keyboard.

After the computer runs its POST routine, each adapter card with a basic input/output system (BIOS) runs its own POST routine. The computer and adapter card manufacturers determine what appears on the screen during POST processing.

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