100 words to describe Wiki or Blog

Image came from Wikipedia

Sometimes some friends asked me what is Wiki or Blog? It's not easy to describe them in couples minutes. Because these "technologies" is still in developmental, sometimes we are not discover them, but to construct their form/styles.

About Wiki
* The community cooperate to write documents. It may be a project of translation. Or the FAQ, open encyclopedia, team works of SARS, the collection of conmanship, to apply to education, the management of books. Or just personal bookmarks, guest books.
About Blog
* Even you didn't understand computer, or the markup language of html, Blog is the simple interface to write and share your feelings.