bitcoin and other currency

hi all,

can any one tell me information ( on brief ) about bitcoin / or any other similar currency i search a lot but i can't understand .

It's just a money like or $. But it's not centralized (mean it's not pass by bank or any control organisme) and alot more fluctuent than or $.

You have so many online directories, there are also many forums built just for each other

I have no proof to give you, I respect the developer I will not give the name of the tool nor the technical details on how it works .