Commonly, some pupils / students don’t know exactly difference between BIOS and CMOS. I would to tell you, if BIOS is a program (software) then CMOS is a chip (hardware). Even both has same mean and intention but they are different. BIOS or Basic Input Output System is more referring to program that you are able to see on monitor screen. Yes, if you press DEL key when computer boot up to access CMOS, the program which able to be seen that is be in fact / exactly called BIOS rather than CMOS. Meanwhile CMOS or Complimentary Metal-Oxide Semiconductor is a chip which is put down integrated with Motherboard.