What are those gray "MSys..." tables!?!?

Over the years I've talked to users that panic because they see grayed out tables starting with "MSys" in their database. Virus?  Trojan?  Spyware?  An add-in that hasn't uninstalled?

Fear not, it's a normal part of Microsoft Access.  At the very least you can hide them.  And they can even make your work easier in some cases.  Learn more about Microsoft Access System Tables here.