Kernel
The bootstrap loader
At this stage, the BIOS still has primary control of the computer. It has loaded a program known as a "bootloader", which loads the operating system kernel (or another bootloader) and hands control over to it.
A computer is loading data when it is turned on and the operating system is being loaded.
it is loaded on the ram of a computer ( memory ) and it is also loaded on a partiton of your hard drive if your operating systemwas installed when you broiught it it is partitiion 1
Operating system must be loaded first so that other applications and programs will be able to work.
Puppy Linux
Not only DOS, all operating systems first loaded to RAM.
booting
Fully loaded
The operating system resides in secondary memory i.e., hard disk.when we boot our computer it is loaded into Primary memory i.e.,RAM and then loaded,this process is called booting
When you boot a computer, you are basically loading the operating system and all of its components. These are necessary for the computer to run and to access your data and software. After the OS has loaded, your startup programs are loaded as well.
At boot up.