David Hayward talks about his favourite connection on the back of a PC
Long before we had these new-fangled USB connections, there were just two choices for hooking up a printer or scanner to your PC: serial and parallel. (Of course, there are three if you include networking.)
Serial was a small, nine-pin port (mostly, although there were other examples) that looked very much like a VGA port, which is why being a techie in the 90s you often found someone complaining of a faulty monitor with the PC end of the VGA cable plugged into the serial port.