I prefer the Beastie Boys' version: the airplane on their first album had the registration code 3MTA3.
A "factoid"...When held up to a mirror so that you are able to read it backwards in the mirror, it should be easy to read the words 'EAT ME'. Many claim that the MTA also has significance as to where the Beastie Boys went to school when they were younger, Yeshiva University High School for boys (a/k/a MTA), a private Jewish school in Washington Heights.
Licensed To Ill
I'm not too familiar with the Beasty Boys so I had to look that one up.