A
Real-Time Clock (
RTC) is part of a
microchip on a
computer motherboard. The small
memory on this chip stores
time values which are usually for
year,
month,
date,
hours,
minutes, and
seconds. When the computer is
activated, the
basic input/output system reads the
current time from the memory on the chip with the RTC. Computers with an
older BIOS have only
two-digit values for the year,
newer ones have a
converted four-digit value for the year. This was part of the
Y2K problem.
thanks to:
http://www.whatis.com