35 Market research services relating to use, usage and ratings information regarding video, audio, and other content on and for mobile digital devices, namely, cell phones, personal digital assistant devices, portable gaming consoles, digital music players, and other portable devices offering video and/or audio content and the listening, viewing, and usage habits of mobile device users; providing online databases in the field of marketing research information relating to use, usage and ratings information regarding video, audio, and other content on and for mobile digital devices, namely, cell phones, personal digital assistant devices, portable gaming consoles, digital music players, and other portable devices offering video and/or audio content and the listening, viewing, and usage habits of mobile device users