>Sell many A-A ones?  Why?

Often it is the only way to get a connector to a position where one can 
easily plug in a memory stick without clambering around the back or under 
the desk to get at the back of a PC.

Another reason is many memory sticks are of such a bulbous shape that one 
cannot plug that and another USB plug into adjacent ports without stressing 
the connectors on the PC, so the memory stick needs to be extended using a 
cable with a plug that meets the USB standard outline.


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