Everyone talkes about how great Wikipedia
is, and it is if you think like a geek, or like a geek parent. But the minute you go beyond looking up the elements, state capitols, famous people in technology, or electronic stuff, then you're lost. Like its just about completely worthless for metalworking. I've run into numerous dead ends on Steel Furnaces, Blast Furnaces, Molecular Gates, and even Foundry mentions that while it was once a term for ironworks (a dead link), most people use the word Foundry for chip fabs. Ok, maybe most EEs do, but there's still a lot of people that fire up their Foundry and melt metal.
Even most of the welding stuff is there because I put it there. Things like thoria, thoriated tungsten, a couple different forms of welding (friction stir, more info on TIG, etc), and so on.
But you know the geek factor is at work when you find they do have an extensive entry for
Explosively pumped flux compression generators.