John and little John getting ready for the night shift.
The shelves against the wall have piles of telegraph equipment from the 1850 to 1920s, The first widely used digital communication system, (1 or 0s).
Note the size of the old stuff! It's tiny by comparision to the key boards, mice and terminals on the desk. The telegraph talked to you. You didn't have to be sitting in front of monitor to use it.