In the late 80s I was working at Rabbit Software in Malvern PA (they made IBM 3270 terminal emulator software). I used to car pool to work from Phila. with a brilliant woman who was a lot older than me, and had a solid lifetime of IBM mainframe experience. I was a Unix hacker with just a few years under my belt.

We realized very quickly that if there was one thing we couldn't talk to each other about, it was computers.