Usenet
/ˈjuːznet/
Definition 1 of 1
Pro Tip 1/3Historical Relevance
Usenet predates the modern internet, so it may be referred to in a historical or nostalgic context. 
Old-timers sometimes discuss the 'good old days' of Usenet.
Pro Tip 2/3Not Social Media
Usenet is different from today's social media platforms; it's more like a collection of forums. 
Usenet operates like a bulletin board system, not like Facebook or Twitter.
Pro Tip 3/3Technical Word
The term 'Usenet' is understood primarily by people familiar with early internet technology. 
When I mentioned Usenet, my tech-savvy uncle immediately knew what I was talking about.