Some fun photos from Large Scale Systems Museum near Pittsburgh!
DEC disk pacs (and some magnetic tapes) everywhere.
…and some very good regular switches, too.
(I liked the whole hierarchy of toggles in that last photo.)
@mwichary Here's another circular mouse for you. This one came with the AT&T 5620 terminal (I used one in grad school back in the day).

Depraz Digimouse Mouse. The Digimouse mouse has 3 paper labels on the bottom that read The AT&T Digimouse box reads Instead of a steel ball like the older mouse's, a transluscent hard plastic ball moves freely in a larger opening in the Digimouse's retainer ring.