I found this label on the Crestron CP3 control processor at a rescue project in Lincoln Park, Chicago. I have heard people call the processor “the brain” many times in the past but this is the first time i have ever seen one labeled that way. It’s not the worst thing in the world but totally unnecessary and the label isn’t even straight.
At the end of October i will be uninstalling everything, cleaning it up and reinstalling it without the “Main Brain” label. I typically put black labels that have white text on them with relevant information like IP Address or processor number (when more than one processor is in use).