The term 'BIG NAME ON INTERNET' can be summarized by the crossword solution 'YAHOO' (5 letters). YAHOO is an American web services provider that was founded in 1994 and is headquartered in Sunnyvale, California. It is one of the most popular websites in the world and provides a wide range of services, including search engine, email, news, finance, sports, and entertainment. YAHOO is also known for its online advertising network and its web portal.