42 Computer and mobile services, namely, providing non-downloadable software applications and interfaces available over a network in order to create a personalized, contextualized on-line information service; indexing, extraction, retrieval, and presentation of information via a computer network, directly and/or based on user selected criteria; creation of personalized indexes of websites and other information sources over a global computer networks, including the Internet; providing services for personalizing on-line digital media user experiences