Arbitron Inc. operates as a media and marketing information services company in the United States and internationally. It offers syndicated radio ratings services to radio broadcasters, advertising agencies, and advertisers in the U.S.; and software used for accessing and analyzing its media audience and marketing information data. The company also estimates the size and demographics of radio audiences, and of network radio programming and commercials; audiences of other media services, including mobile media and out-of-home television viewing, and measures usage; and audiences across various platforms of media. In addition, it provides consumer, shopping, and media usage information services, such as Scarborough, RetailDirect, and Qualitative Diary/LocalMotion services to radio stations, cable companies, television stations, out-of-home media, magazine and newspaper publishers, advertising agencies, and advertisers, as well as non-syndicated research services to companies that are seeking to demonstrate the value of their advertising propositions. The company’s software applications include Maximi$er, TAPSCAN, and PD Advantage for radio stations; Media Professional and SmartPlus services for advertising agencies and advertisers; and PPM Analysis Tool for radio stations and advertising agencies. The company, formerly known as Ceridian Corporation, was founded in 1912 and is headquartered in Columbia, Maryland.