Someone please answer this now. :)
net bios
Yes you can, but only if the BIOS setting permits it. If it doesn't do it automatically you will have to check the "Boot devices" settings and make sure CD-ROM comes first in the list. You can check the BIOS settings at the point when you boot up the PC after it has been switched off. Switch on the PC and then, during the boot-up phase, you must keep holding down the 'Delete' key until the BIOS settings screen is displayed. Then find the "Boot devices screen" and use the 'Page Up' and 'Page Down' keys to ensure that "Boot from CD-ROM" appears 1st in the list and the Hard Disk appears 2nd in the list. Then save the settings and allow the PC to reboot. It will then check if there is a CD-ROM inserted in the drive. If there is a CD-ROM there it will try to boot from it. If you have made the PC's 2nd boot device the Hard Disk then, if there is no CD-ROM in the drive, the PC will go to the the Hard Disk to boot up. All that will happen automatically every time the PC is rebooted.
BIOS
Change the boot order in the CMOS/BIOS.
BIOS
To do this (assuming you have a bootable DVD ROM - i.e. one with an operating system on it), you need to tell your PC's BIOS to look at he DVD drive during the boot sequence and make this the first drive to try and boot from. To do this you need to get into the BIOS menue - you PC manual will tell you how to do this but you can also try pressing the one of the 'F2', 'F8', 'F9' or 'F12' keys while the PC is starting up (before windows loads), one of these should work! - and change the boot menue options.
Both internal and external hard drives can be removed from a computer provided that the PC does not boot from any of them. In that case, the first boot device would have to be a removable drive like CD-ROM/DVD-ROM or floppy drive.
As far as i know Boot is the full form. I believe it is derived from the word Bootstrap which means "use a simple process to start a more complicated process"
PC ROM- Personal Computer Read-Only-Memory
You might be talking about the BIOS, the Basic Input Output System stored on a ROM chip on the Computer Mainboard. It is the initial boot code run by the pc.
POST
It must run from a boot disk in order to boot a PC and test memory on that PC.