1980 Milestone Bulletin Board System (BBS) emerges as one of the earliest known forms of social media, and remains popular and under development until the late 1990s.[8] (21 h 41 m, 31 dic 1979 año – 2 h 1 m, 11 mar 1980 año)
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21 h 41 m, 31 dic 1979 año
2 h 1 m, 11 mar 1980 año
~ 2 months and 12 days