I've been going to libraries since oh about 1958 or so, maybe a little longer. There was a nice, if small, Carnegie library a block from my elementary school. My wife is a college professor, and the school where she is a department chair has a very nice library, much larger than a school their size would normally have. Don't go so much anymore, since most of what I want to know I can look up on line. I do recall going through two different collections of Thomas Jefferson's papers in their "stacks", trying to verify a quote, which is most likely a bogus one.
The (not for profit) research institute I work for has a pretty large library. The US Army command where I'm currently assigned also has a small library. Neither have just technical materials though I doubt the latter has the OED though, the former might.
So yes, I am familiar with libraries. Just a wee bit.
You see, my personal library has the 20 volume 2nd edition of the OED. It probably means something, but I'm not quite sure how to express it.
ML/NJ