The library homepage search box searches all library systems--the catalog, articles, and library websites.
The catalog contains all of the holdings of all Cornell University libraries including records for books, ebooks, DVD's/videos, sound recordings, magazines/newspapers/journals, online journals/newspapers, computer files, government documents, manuscripts and archives, maps, musical scores, and more. Everything but articles!
A keyword means find the word anywhere--title, author, notes, description, publisher, etc.