Memory Stick is a proprietary removable flash memory card format created by Sony.
Memory stick may also be used informally to refer to:
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in general; electronic flash memory data storage devices used for storing data, typically in portable devices
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USB flash drive (or "thumb drive", "pen drive", etc.), a removable flash memory based data storage device with an integrated USB interface
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DIMM (dual in-line memory module), a module containing random access memory (RAM) mounted on a printed circuit board for installation into a computer
