UbuWeb is the largest non-profit online archive of avant-garde art. It was created and is co-ordinated by the artist Kenneth Goldsmith. It is a curated repository. It offers visual, concrete and sound poetry, expanding to include film and sound art mp3 archives. Beyond its repository of works, UbuWeb features curated sections including /ubu Editions, UbuWeb: Ethnopoetics, UbuWeb: Papers and UbuWeb:Outsiders. UbuWeb, although still informal, has grown into a relevant and recognized critical institution of contemporary art. Artists want to see their work included in its catalogue and thus agree to a relationship with UbuWeb that has no formal contractual obligations.