This document discusses audience classification categories for media products. It recaps the key categories of age, class, gender, ethnicity (demographics). It then introduces additional categories: psychographics (attitudes, opinions, lifestyle), geodemographics (where people live), and sexuality. A case study of Andover Sound radio station emphasizes that understanding geodemographics of its local listeners is important for marketing to local businesses and competing with other media for advertising revenue. The challenge is to create an audience profile for the iPhone 4 using all the classification categories discussed.