Memory Cards, Memory Stick, Memory Stick Pro Duo
The Memory Stick Pro Duo is roughly two thirds the length of the standard form factor. It was developed in response to Sony's need for a smaller flash memory card for pocket-sized digital cameras and mobile phones.
The MS PRO DUO card has been categorised into the following for your convenience: Standard Speed | High Speed | Professional
The Pro Duo card has a variety if uses in devices such as mobiles phones, digital cameras, PSP's, etc.