Realy stupid question hp zv330us

i have a hp pavilion zv5000 or actually a zv5330us
my question is probably very simple
it has the regular output ports serial parallel vga s-video
but there is one i dont recognize
it is kinda thin wider than a hdmi i think its male and slanted on the edges
does everyone but me know what its for?
thanks

There are no stupid questions. Only stoopid answers.

And here is one: Could it be the Texas Instruments PCI (TI-PCI) 1520 and 1620 Cardbus Controller (Media Card Reader)

ill check it out
thanks