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Our online glossary is here to help you make sense of the terminology used in the cell phone industry. It covers mobile technologies, such as 3G and 4G, and even includes a bit of information on smartphone operating systems and the companies that make the cell phones and other mobile technology devices we all use.

What is "RS-MMC"?

The RS-MMC memory card format is a smaller form factor version of the MMC card specification. The RS in the name stands for "reduced size". The cards measure roughly 24mm x 18mm in size and can be used in a full size MMC card slot when attached to an adapter. RS-MMC cards are not in common use any longer, having given way to the far more popular miniSD and microSD card formats.

See Also: MMC, miniSD, microSD

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