Back in the 80’s I worked at a company that sold and installed pen plotters (both desktop and large format) along with the CAD software and workstations to run

Back in the 80’s I worked at a company that sold and installed pen plotters (both desktop and large format) along with the CAD software and workstations to run them. It was always a PITA to attach them because they always used RS232 serial ports and each vendor used a different arrangement of pins. You usually had to customize each connector, removing pins and soldering others together. Still they were lots of fun to watch. People who weren’t even in the market for them loved to watch them work. It was like watching a little critter run around frantically on the page drawing an image. With each little stroke the image grew. It was a very relatable process. It kind of reminds me of watching a Roomba clean a room.