It reminds me of a PBS feature about making custom wooden staircases or something.
They had a guy in the office who would use a CAD station to open a customer's file and send it to a plotter, then carry the plot into the next room and laboriously digitize the drawing into a different CAD system, using a magnifier to center a puck's crosshairs over line ends and intersections and cardinal points of curves.
That was his job, and he took it very seriously.
Maybe he knew he could be replaced by a cable and a little software.
;--
Maybe the keyboard pounders are copying lengthy legal documents from one server to another across an airgap.
... or just testing keyboards or cables or connectors.
I can't explain the printout.
... Or, maybe I can. Back in my programming days, I would print out an entire project's code on the backside of greenbar, bind it, review it, mark it up, and then revise the code and start over. I used a big box of fanfold pretty much every week, and shredded most of it. It wasn't spaghetti code, but the linkages were distant enough that it was not possible to see its interactions on a 80x24 terminal. I'd have killed for the multi- windowed graphical environments we take for granted today.
I was so hard on printers that I got samples of proposed new ones to try out for use in our products (which printed a page of results, mixed graphics and text, three times a minute 24/7 in a hospital lab). That was long before inkjets or lasers arrived. Three mixed pages a minute is asking a lot of an impact printer.
Maybe they're testing printers.
Right about now, I'd be rooting around in the recycle bin, just out of morbid curiosity.