Digital

A postage stamp-sized card, similar to the Multimedia MMC card format.
Store data on portable devices, such as MP3 players, digital cameras, handheld computers and cell phones.
Secure Digital can also allow devices to add technologies, such as Bluetooth wireless connectivity or global positioning system (GPS).
Complies with Secure Digital Music Initiative standards protecting against unauthorized replication of copyrighted content.
Never get caught without enough data storage space.
Nothing can be more miserable than being out in the field, or with family and friends and suddenly find that you've filled your camera's integral and removable memory to capacity.
No digital camera owner should go anywhere without at least two spare removable storage cards.
Don't forget to pick up a handy compact flash adapter or reader to allow direct access from your cards to USB/Parallel ports, or to standard PCMCIA card slots common to laptop PCs.