davidbenett t1_iy9llf6 wrote
Reply to comment by bolanrox in TIL about the TwitterPeek, a Twitter-only mobile device introduced in 2009 that allowed users to send and receive tweets...and nothing else by wilymon
Also hash tags, because everything had to be in-band. Previously tags were popular on blogging platforms but were out-of-band from the message/post.
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