A memory card reader is a device, typically having a USB interface, for
accessing the data on a memory
card such as a CompactFlash
(CF), Secure Digital
(SD), MultiMediaCard
(MMC), Memory Stick (MS)
or xD-Picture Card.
Today card readers can be categorized into three by the type and
quantity of the card slots: single card reader (e.g.SDDRX4-CF-901
), multi card reader (e.g. TS-RDM3W)
and series card reader (e.g. SDDR-108-A11M).