Köppen climate classification | Terry Riley | British undergraduate degree classification | James Whitcomb Riley | British Board of Film Classification | Bridget Riley | Bob Riley | Baba O'Riley | Points classification in the Vuelta a España | Mountains classification in the Giro d'Italia | Biological classification | Teddy Riley | Richard Riley | Race (classification of human beings) | Pat Riley | Fort Riley | Dewey Decimal Classification | Christopher O'Riley | Bordeaux Wine Official Classification of 1855 | Stellar classification | Riley | Paul Riley | Old Mother Riley | Mike Riley | Mathematics Subject Classification | Library of Congress Classification | Classification of discontinuities | Amber Riley | Race (human classification) | Office of Film and Literature Classification |
In 1974, radio sources were divided by Fanaroff and Riley into two classes, now known as Fanaroff and Riley Class I (FRI), and Class II (FRII).