In a word, USENET. It's still alive today, to get a feel check out sci.electronics.design (which is a still active newsgroup - Winfield Hill still posts to it)

In a word, USENET. It's still alive today, to get a feel check out sci.electronics.design (which is a still active newsgroup - Winfield Hill still posts to it): https://groups.google.com/forum/#!forum/sci.electronics.design https://groups.google.com/forum/#!forum/sci.electronics.desi...