Real Time Clock usually refers to a hardware IC which is designed to keep time accurately.
Dallas semiconductor makes a number of RTCs. If you are really curious, you can download datasheets at maxim-ic.com
Military time 1500 is equivalent to 3:00 PM.
It is when people are online at the same time. It is used for communication across the internet between users (usually used for instant messaging). There is little or no delay between broadcast and...
it is very easy.
to tell the difference between fake and real things
look on a corner on your computer and there should be a clock there