Computersight -

Not everyone who has a personal computer knows how it works.A lot of people only know just how to play games and surf the net,not knowing the basics of PC.I will try to explain how it works.

Lets start :

When you turn on you PC the first thing your computer does is POST (Power-on self-test) which is looking if there are all peripheral devices (basically input and output devices together) or if there is something wrong with them.Once the POST is completed the next thing coming is BIOS (basic output-input system). The primary function of the BIOS is to identify and initialize system component hardware (such as the video display card, hard disk, and floppy disk) and some other hardware devices.Which means BIOS is preparing the mashine into a low capacity state so other software programs can be loaded from devices like hard disk (HDD).This process is known as bootstrapping.

Bootstrapping is done by boot loader which is placed in the 0 sector of hard disk and loads the kernel (kernel is the core of the operating system) from hard disk into the memory (RAM),kernel is located betwen partition and 0 sector of HDD.Like i sad the kernel is the core of hard disk and he is connecting the application software to the hardware of a computer.

And when everithing loads then the user is able to use operating system.Operating system is like a massive aplication which has the connection with hardwares making it more easy for users to interact with their hardweres.