its called a "boot-up"
Dual-booting is the process of running more than one operating system on a computer.
booting up POST, or Power On Self Test
Booting is the process of starting the computer from a power off condition. It has nothing to do with C++.
the three methods are Booting with GRUB Booting with LILO and last but not least is Booting with CD's i.e ISO images
The process of starting a computer - from switching on, to being 'user ready' - is known as 'booting' or 'booting up'.
The first step in the booting process is POST (power-on self-test).
COLD BOOT - Booting up from power off condition.WARM BOOT- Restarting the computer WITHOUT turning the power off.http://wiki.answers.com/What_is_the_difference_between_cold_and_warm_booting#ixzz18HVIBp79
Booting is the process a computer fallows by loading all necessary files to run an operating system.
booting
That would be the BIOS.
booting