What Full name of CMOS?

Answer 1

Complimentary Metal Oxide Semiconductor

Actually, if you are referring to where your computer stores the data for hardware configurations; the CMOS is actually called nonvolatile BIOS memory. It used to be called CMOS RAM in the early days of computing, but we still call it the CMOS.

Answer 2

Complementary-Metal-Oxide-Semiconductor. This refers to one of the technologies used to make integrated circuits ("chips"). Another common technology is Transistor-transistor Logic (TTL).

In reference to the IBM PC and compatibles, this means the RTC's (Real-time clock) CMOS RAM memory, which keeps track of the time, date, and BIOS settings. The CMOS and the RTC are powered by a rechargeable battery on the motherboard that keeps them on even when the computer is off. However, should this battery run out, the time and BIOS settings will be lost and they will have to be manually re-set.

Answer 3

Excerpt from Microsoft Computer Dictionary (5th Edn):

CMOS n. 1.Acronym for complementary metal-oxide

semiconductor. A semiconductor technology in which

pairs of metal-oxide semiconductor field-effect transistors

(MOSFETs), one N-type and one P-type, are integrated on

a single silicon chip. Generally used for RAM and switching

applications, these devices have very high speed and

extremely low power consumption. They are, however,

easily damaged by static electricity. 2. The battery-

backed memory used to store parameter values

needed to boot PCs, such as the type of disks and the

amount of memory, as well as the clock/calendar time.