One of the wonderful tools in now world is what we call Computer. Computer in many ways has made our jobs easy and simple. Anyway do you know that the computer is just began from a small bit memory, binary code and register only? What the computer operation is just to apply ADD, SUBTRACT at [...]

In the ancient time, the clock maker ask to the clock before selling his clock. “My clock, can you beat as much as 31,536,000 times in a year?” The clock answered, “Ha, it is to much for me to do that!”“Oh, If that so much for you, can you do it 2,628,000 times in every [...]

When I was in Elementary School, my neighboor showed me a lens. Through this lens I could see his nose bigger. I was exiting to look another by that lens.
When I was in Junior High School I learned that a lens could be used to burn a paper through sun shine that passing through the [...]