• by Joe Mandese  @mp_joemandese, May 18, 2009

It's a chart showing the u.s. Postal services revenues fro 1790 on.

"Is that social media?," Wieser asks during our cab ride across town to Lotame.

I argue that unless those letters were shared with more than one other person then it is. If not, then it's not. Us postal service revenues fro 1790

Is that social media?