Found in 1 comment on Hacker News
johncoltrane · 2013-01-09 · Original thread
I know HN is not reddit (and the link is relatively old), but check this alternative take on the history of Ping:

http://www.amazon.com/Story-about-Reading-Railroad-Books/dp/...

BTW, someone has to write a long form article or a thesis on the Amazon Customer Reviews scene…

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