The history of modern digital computing is unusual in one regard. Most of its advances have occurred during the professional lifetimes of many of its current practicioners. That has rightly put a premium on preserving some of our history while its early creators are still with us.

For those of us who came of age in the mainframe era, it is instructive (and sometimes humorous) to remember what has changed. This photograph shows me at the Computer History Museum posed by parts of ILLIAC IV.

Herewith, in the spirit of Jeff Foxworthy's humor, are a few tests to determine if you are a computing old timer.

No doubt about it, I am a computer old timer. I am sure many of you have your own, similar stories. I would love to hear some of them.