[ Apparatus for recording, transmission, or reproduction of sound or images; prerecorded magnetic data carriers featuring information on a trade show and on trade show attendees or exhibitors and their goods and services, prerecorded recording discs featuring information on a trade show and on trade show attendees or exhibitors and their goods and services; prerecorded CDs, DVDs, and other digital data carriers featuring information on a trade show and on trade show attendees or exhibitors and their goods and services; data processing apparatus; computers; ] electronically downloadable publications, namely, [ books, ] brochures, [ text files, ] and programs featuring information on a trade show and on trade show attendees or exhibitors and their goods and services; downloadable pictures, games, and films featuring information on a trade show and on trade show attendees or exhibitors and their goods and services; [ audio recordings featuring pieces of music; ] software, namely, mobile device applications providing information on a trade show and on trade show attendees or exhibitors and their goods and services, exhibition hall maps, news access, and exhibitor search functionality and product search functionality for a trade fair