You know you’re an engineer if you know it’s National Engineers Week.

Check out the following tongue-in-cheek indications that you’re an engineer.

They were developed primarily by Design News staff based on comments posted to our stories over the years. We ran into one or two that were floating around in cybespace and were just too good to ignore. However, most of these signs that you’re an engineer are homegrown and tested by your fellow engineers.

The first item ponders the machine in the photo above. Click on the next screen to confirm what you already know and celebrate the traits that make engineers engineers.