What is the mean of the Booting in the operating system?

آپریٹنگ سسٹم میں بوٹنگ کا کیا مطلب ہے؟

To turn off

To scan

Install the program

Restarting computer

Booting is a process of the restart the computer.

After restarting it, there is no software in the computer's main memory.

Cold and warm are types of Booting.