Leaving work late last Friday, I was impressed with the Bosch brand alarm-panel by the door. I botched entering the access-code, trying to arm the system, and the tiny LCD said,
Invalid Code
Let’s try again.
Security systems are designed to keep people out, have Spartan interfaces out of necessity, and consequently are often somewhat hostile to use. It’s a small thing, but that phrasing “let’s try again” made me smile, and that made a difference.