What does HUH mean?

Looking for the full meaning of HUH? From the following image, you can find out all definitions of HUH. If you want, you can also download image file to print.

HUHHahnemann University Hospital
HUHHarper University Hospital
HUHHarvard University Herbaria
HUHHoward University Hospital
HUHHrvatska Udruga Hotelijera

What does huh stand for?