OK..now I'm confused about my rear (again)

[Canada20]

All this talk about 14 bolt vs Dana60 vs coporate has me turned around on what's what....

I thought a 14 bolt was the same thing as an Eaton rearend and that the Eaton was pretty much the same thing as a Coporate rear. In fact I had it in my head that Eaton was the company that made the 14 bolt rear starting in the '70's, kind of like Tremec started making the Ford toploader in the late '70's for Ford. And Dana is short for Dana-Spicer, the company that makes diffs that the "big 4" (at the time, AMC was still alive) were using in trucks and jeeps and suchlike.

So what is a corporate rear, an Eaton and how do I tell the diff?

Thanks

Greg