More USBs on A13

[MMp131316]

Hello everybody,
I want for my next project to attach to my olinuxino a13 board several components: mouse, keyboard, ethernet stick, a printer usb, and a webcam. However I do not have enough usbs. I know there are some sort of usb multiplexers(I don't know exactly how they are called) which allow you to have form one usb several usbs.
My question is first how are those things called and second are they compatible with olinuxino a13 ??

Thank you very much ? 

[progmetalbg]

I know there are some sort of usb multiplexers(I don't know exactly how they are called)

They are called USB hubs: http://en.wikipedia.org/wiki/USB_hub and you can buy one for 5 euro or less.