what is wiki? That is an important question. Everyone participates in Wiki. They say that Wiki is the library where everyone is an author. Society uses Wiki for everything: for government, for business, for entertainment, for communities, for individuals. But why do it this way? Why, every day, to go sit at a computer and read and write Wiki pages? Why not make laws some other way? Why not buy and sell some other way? Why not meet people some other way? To answer these questions, we must understand the history of Wiki. We must ask: How became Wiki?