for example, fans sharing public domain music or sample tracks that new bands have released for publicity purposes, families sharing photos, movies, and genealogical information, and teenagers playing multiperson on-line games 例如,樂迷共享收集的公域音樂或新樂隊用于推銷自己的樣本音樂;家庭共享照片、電影及家族信息;十幾歲的青少年玩多人在線游戲。