So let's say that you're playing through the G.I. Joe game for the NES and you're getting frustrated at it. But before you give up on it, you want to see the ending sequence for some reason. Maybe to complete your collection of NES game endings.

So you go to the Password screen and put in this password

Which, if you take out the Z's, says "1ST NDG", is kind of like it saying "First Ending"

Which makes it way easier to remember.

But does that mean that there are multiple endings for this game? Well, no, not that I was able to discover.