What kind of math is right for you?

Apparently this poster was handed out at a recent AMS math meeting, trying to show people how there are many cool options when you choose to go into math. Sounds good right? But let's play the game "Which of these is not like the others..."

What's that you say? All the men are doing pure math and all the women are doing applied math? What a fun puzzle for cluster feature selection! Do you think they were trying to get us to see the pattern? That's a math problem you know.

Thanks to Tullia Dymarz for her response photo:

This one's another puzzle! These ladies are all studying different aspects of what field? Turn your computer upside down to find out!

ʎɹoǝɥʇ dnoɹƃ ɔᴉʇoʇdɯʎsɐ :ɹǝʍsuɐ