Whatzit? #3

I think that the second Whatzit? puzzle was a little easier than the first puzzle! The answer was “Permanent Wave.” The picture was very clear, it said “permanent” and it was written in a wave, put two and two together and you have permanent wave.
The first thing that I thought of when I saw the answer was Geography 12. For some reason I remember learning about permanent waves but I can’t seem to find anything on the internet. Does anyone know what I am thinking about? I might just be confused...
But here is the definition I got off Google,
“A permanent wave, commonly called a perm, is the chemical treatment of hair to produce curls. In cosmetology, it is termed a type of curl reformation. Humans have been attempting to add curl to straight hair for thousands of years.”
Is that what everyone who guessed thought?
I found another somewhat easy one so keep on guessing, but try not to view the comments before you guess because then it will give it away! Good luck.