Computers and its uses grew rapidly and widely through out the world. They are used to deal with many tasks due to their various potential. It helps to resolve problems human life encounters in daily life. Therefore, they have more influence on our life. The impact of computer usage on our life obviously identified as Savings of Money, Time and Effort. To understand the depth of computer intervention in human life, have a look at developments happened in the areas of Communication, Education, Utility facilities and Health care.
CMOS Battery gives 'backup power' to CMOS (Complementary Metal Oxide Semiconductor) of a computer to keep some parameter values, eg: RTC (Real Time Clock). These primary parameters shall be used when the system gets booted again. Many computers use CMOS memory to hold current time and date.