Have you ever had experience of not understanding well though you examined a certain word with the dictionary and Wikipedia?
"Who knows ?" is a convenient application for the person who wants to get a simple explanation about a difficult economic term and the technical term, etc.
The usage is easy. By only inputting the word to be examined, you can search the person who is clearly explaining the word out from the internet.
Please use this very simple "Social Dictionary" to fill the intellectual curiosity.
iOS Requirements : iOS 3.2 or greater