Categories are aggregated by Ad Age from TNS classifications as follows (not comprehensively):
Automotive includes manufacturers and dealerships; Retail includes discount department & variety stores,
department stores, retail, shopping centers & catalog showrooms; Telecom, internet services and ISP
includes telephone companies (wireless, local and long distance), internet service providers, web designers,
communications networks, telephone equipment, and offline internet support; Medicines & proprietary
remedies: Pharmaceutical houses, medicines & proprietary remedies, fitness, eyeglasses, ...