That IBM Is Almost As Big As Me

I forgot now how I found this site, but I got some good laughs out of a blog called awfullibrarybooks.wordpress.com
It’s mostly a tribute to books the blog’s authors and contributors found in libraries that are extremely outdated.  I got a big kick out of this gem:

When's the last time someone checked this one out from the library? I mean, checked it out to actually use it, not just to laugh at it.

Ok, computer dorks um, experts – who can tell me what some of those little doo-hickeys  are on that IBM 370?  I’ve already done some simple research and found that this computer is circa 1970.  Has anyone played around on something like this?