Computer-based message and image transmission business; digital media streaming service business; electronic bulletin board provision business for social network services; electronic bulletin board service business; electronic message transmission business; electronic transmission business of movies/music/videos/games and multimedia contents; information transmission business via optical communication networks, information transmission business via domestic and international networks; internet broadcasting business; internet chat room service business; IP broadcasting business, audio/video/still and moving images/text/data transmission, broadcasting, and reception business message transmission business; multimedia broadcasting business using the Internet; multimedia contents broadcasting business using the Internet; online chat or online bulletin board service provision business; remote communication access provision and broadcasting business for video and audio contents provided through on-demand video services via the Internet; smartphone application community service business; television program/video film/other audiovisual and multimedia contents broadcasting business; video and voice transmission and reception business using the Internet