When I started at my current job, I had basically no familiarity with AWS. Someone tried to explain how AWS networking worked to me and did so by drawing this on the whiteboard at the office.
If it's in a meeting room or public space, that whiteboard is fair game when you leave it, unless you write DO NOT ERASE in big letters. Them's the rules
Story time. One time I was working for a local monthly paper that was all-volunteer and I interviewed someone at one of our local colleges. The interview went fine but on my way out, I noticed through a window of an empty classroom a white board with nothing on it except the words:
Trivia: According to the Mr. Show season 4 DVD commentary, years after the show ended, cast member Paul F. Tompkins had overheard someone talking on a cell phone in a bar utter the phrase “mother father chinese dentist!” When asked if she was a fan of the show, her reply was “What?”