What blood type is the Universal Donor

What are the blood types :
A
B
O
AB
* there is also RH classification which divided into : + and - ( can be to any blood type 
What blood type is the Universal Donor ?
O - or only O is the universal donor , which mean it can donate to any other blood type 
what type of blood is universal recipient ?
AB + is the universal recipient , which mean it can recieve blood from any other blood type