The CF Card (also called CF memory card, Compact Flash Card) is a very small removable mass storage device. First introduced in 1994 by SanDisk, CF memory Cards weigh 14grams and are the size of a matchbook. CF memory Card is the world's most popular removable mass storage device. CF memory Cards are designed with flash technology, a non-volatile storage solution that does not require a battery to retain data indefinitely. Compact Flash storage products are solid state, meaning they contain no moving parts, and provide users with much greater protection of their data than conventional magnetic disk drives. CF memory Cards are faster and more reliable and consume only five percent of the power required by small disk drives. Compact Flash technology has enhanced the lifestyle of millions of people. The products that use Compact Flash Cards include digital cameras, digital music players, desktop computers, handheld PCs (HPCs), personal communicators, Palm PCs, Auto PCs, digital voice recorders and photo printers.

The SD Memory Card is a groundbreaking new bridge media that's helping to pave the way for tomorrow's fully networked society. This tiny, easy-to-use card offers a host of powerful advantages. It links various kinds of digital equipment through its easy connectivity that supports a host of application formats and does not require the use of a PC. Already supported by more than 665* companies around the world, the SD Memory Card is well on its way to becoming the de facto standard memory card for digital connectivity. Soon, the SD Memory Card will provide universal access to an even wider array of multi-media data. The SD Memory Card measures a mere 24mm by 32mm by 2.1mm. The miniSDTM Card, measuring 20 x 21.5 x 1.4mm (W x L x T)
*As of December 31, 2003

The xD-Picture Card is a type of flash memory card, used mainly in digital cameras. xD stands for extreme Digital and are used in Olympus, and Fujifilm digital cameras and Olympus digital voice recorders; Fujifilm also made an MP3 player that used the cards. As of 2006 xD cards are available in these capacities: 512 MB, 1 GB, and 2 GB. An xD card is 20 mm × 25 mm × 1.78 mm and weighs 2.8 grams

The MultiMediaCard (MMC) is a flash memory memory card standard. Unveiled in 1997 by Siemens AG and SanDisk, it is based on Toshiba's NAND-based flash memory, and is therefore much smaller than earlier systems based on Intel NOR-based memory such as CompactFlash. MMC is about the size of a postage stamp: 24 mm x 32 mm x 1.5 mm. They have been more or less superseded by Secure Digital cards, but still see significant use because MMC cards can be used in any device which supports SD cards. Typically, an MMC card is used as storage media for a portable device, in a form that can easily be removed for access by a PC. For example, a digital camera would use an MMC card for storing image files. With an MMC reader (typically a small box that connects via USB or some other serial connection, although some can be found integrated into the computer itself), a user could copy the pictures taken with the digital camera to a computer. MMC cards are currently available in sizes up to and including 8 GB, and are used in almost every context in which memory cards are used, like mobile phones, digital audio players, digital cameras and PDAs.

Memory Stick is a removable flash memory card format, launched by Sony in October 1998, and is also used in general to describe the whole family of Memory Sticks. This family includes the Memory Stick Pro, a revision that allows greater maximum storage capacity and faster file transfer speeds; Memory Stick Duo, a small-form-factor version of the Memory Stick (including the Pro Duo); and the even smaller Memory Stick Micro (M2). The original memory stick was available in sizes up to 128 MB and now an 8 GB card has neen unveiled at the 2006 Consumer Electronics Show in Las Vegas, but according to Sony the Memory Stick Pro has a maximum potential size of 32 GB.
The Memory Stick is defined in the minds of many by its proprietary nature, as the majority of portable devices that use it are Sony and Sony Ericsson devices. The significant third-party licensees that make Memory Sticks are SanDisk and Lexar. In spite of its proprietary nature (or because of Sony's continuing support for the format), the Memory Stick has outlived almost all other strictly proprietary flash memory formats, and has a longevity comparable only to CompactFlash and Secure Digital (SD).

Gaming Memory Cards
SanDisk Gaming Memory Cards maximize your world of entertainment. As powerful as they are colourful, these little cards let you get maximum performance, and take advantage of all the advanced features that turn your handheld game device into a fully loaded multimedia entertainment unit.
The product line includes Memory Stick PRO Duo for PSP (PlayStation® Portable) and SD cards for gaming devices with an SD slot. For maximum performance and to get the most out of all the advanced features on the device, youll need a SanDisk Game Card. With SanDisk, you will be able to save your game levels, listen to digital music, play your favourite video, and download and store game cheat codes, characters and game skins.
SanDisk game cards utilize exclusive MLC memory and controller technology developed at SanDisk, meet all Memory Stick specifications, and are guaranteed compatible.

USB flash drives are data storage devices integrated with a USB interface. They are typically small, lightweight, removable and rewritable. As of 2006, more recent examples in the 1 to 4 GB range are little more expensive than the 128 MB versions available in 2002.
USB flash drives have several advantages over other portable storage devices, particularly the floppy disk. They are generally faster, hold more data, and are considered more reliable (due to their lack of moving parts) than floppy disks. These types of drives use the USB mass storage standard, supported by modern operating systems such as Linux, Mac OS X, and Windows XP.
A flash drive consists of a small printed circuit board encased in a robust plastic or metal casing, making the drive sturdy enough to be carried about in a pocket, as a keyfob, or on a lanyard. Only the USB connector protrudes from this protection, and is usually covered by a removable cap. Most flash drives use a standard type-A USB connection allowing them to be connected directly to a port on a personal computer.
Most flash drives are active only when powered by a USB computer connection, and require no other external power source or battery power source; they are powered using the limited supply afforded by the USB connection. To access the data stored in a flash drive, the flash drive must be connected to a computer, either by direct connection to the computer's USB port or via a USB hub.

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