| SD (Secure Digital) is a kind of memory card that is very small and is normally used in things like PDAs, mobile phones and digital cameras. One of the top corners of the card is slanted for ease of insertion. The cards are called 'secure' as they have a copyright built in to them which means that they can only be read by certain devices. This is called the "key revocation" and if you would like more information on this contact the SD Card Association. |
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