Computer software located on a specific server and shared with other computers across global communication networks to provide access to demographic data, mapping applications, market research, and advertising media vendor contact information for newspapers, magazines, business journals, radio stations, television stations, cable companies, indoor advertising companies, outdoor advertising companies, video advertising companies, transit advertising companies, and online advertising companies stored on the specific server; which facilitates fact based purchasing decisions, by the software user, of the media provided by the advertising companies; communications services to facilitate access to timely response data pertaining to the public's response to the advertisements placed by the user with the advertising media vendors