9 Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers, blank recordable optical discs; blank compact discs, recordable DVDs; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment, computers; computer software for use as a data management platform (DMP), to develop trading strategies, to download and display advertising, to purchase digital advertising, to purchase advertising in an automated fashion, including through use of a demand side platform (DSP), to sell advertising in an automated fashion, including through use of a supply side platform (SSP), for use as cross-site advertiser analytics, for use as single-site publisher analytics, for use in real-time bidding, to build, operate and evolve real-time trading platforms all for use in the field of on-line advertising and real-time media trading; fire-extinguishing apparatus; pre-recorded electronic and digital media, namely, CDs, DVDs, CD-ROMs featuring software for use as a data management platform (DMP), to develop trading strategies, to download and display advertising, to purchase digital advertising, to purchase advertising in an automated fashion, including through use of a demand side platform (DSP), to sell advertising in an automated fashion, including through use of a supply side platform (SSP), for use as cross-site advertiser analytics, for use as single-site publisher analytics, for use in real-time bidding, to build, operate and evolve real-time trading platforms all for use in the field of on-line advertising and real-time media trading; computer programs for use as a data management platform (DMP), to develop trading strategies, to download and display advertising, to purchase digital advertising, to purchase advertising in an automated fashion, including through use of a demand side platform (DSP), to sell advertising in an automated fashion, including through use of a supply side platform (SSP), for use as cross-site advertiser analytics, for use as single-site publisher analytics, for use in real-time bidding, to build, operate and evolve real-time trading platforms all for use in the field of on-line advertising and real-time media trading; computer software platforms for on-line advertising and real-time media trading