The International Music Score Library Project (IMSLP) is a project for the creation of a virtual library of public domain music scores, based on the wiki principle. Since its launch on February 16, 2006, more than 17,000 scores, for 10,000 works, by over 1,000 composers have been uploaded, making it one of the largest public domain music score collections on the web. The project uses MediaWiki software to provide contributors with a familiar interface.