Not so much of a joke as a cute story. There was once a programmer with a dog named Biff who would bark at the mailman every time he delivered the mail. The programmer wrote a program to monitor incoming email and beep when you got a message, and named it biff.
In 2004, I was working on the bridge of a ship that was going to be inspected in a few days. There was a small hole in a wall about the size of an electrical outlet with exposed wiring that I wanted to hide from the inspectors. I printed out a picture of a kitten and taped it over the hole. I visited the ship again in 2018, and the kitten was still there.
A similar series written by an engineer whose character goes back about 10 years before the Mongol invasion of Poland. He uses his skills to fast-forward society into the age of steam while simultaneously avoiding being burned as a witch: https://en.m.wikipedia.org/wiki/ConradStargard
Unfortunately, the author has had some JK Rowling moments, but I really enjoyed the books.
Image #4 confirms a feeling I've had for a while: Uhura is out standing in her field.