A wiki is a co-operative website developed by a community of users. It was coined by Ward Cunningham in 1995 as a name for his own website, the first of its kind. The word comes from 'wiki-wiki' the Hawaiian word for 'quick'. It gave its name to Wikipedia, a non-profit, completely free online reference source.
A silver mine in Joachimstal (now in the Czech Republic) began minting a coin in 1519 called the 'Joachimstaler'. This became the 'taler' which the Germans called a 'daler' and we call the DOLLAR