The search engines Google, Yahoo! and MSN used in some cases the title and abstract of the DMOZ (aka Open Directory Project) listing of a website for the title and/or description (also called snippet or abstract) in the search engine results pages (SERP). To give webmasters the option to specify that the Open Directory Project content should not be used for listings of their website, Microsoft introduced in May 2006 the new "NOODP" value for the "robots" element of the meta tags.[15] Google followed in July 2006[16] and Yahoo! in October 2006.[17]