A memory card or flash memory card is a solid-state electronic flash memory data storage devices used with digital cameras, Personal Digital Assistant and laptop computers, telephones, music players, video game consoles, and other Electronics. They offer high re-recordability, power-free storage, small form factor, and rugged environmental specifications. There are non-solid state memory cards that do not use flash memory, and there are different types of flash memory.

Flash cards have been suggested as a possible replacement for the floppy disk, though it has been keydrive, which work on almost any computer with a USB port that have been filling this role instead.

There are many different types of memory cards and jobs they are used for. Some common places include in digital cameras, in game consoles, in cell phones, and in industrial applications. PC Card (PCMCIA) were among first commercial memory card formats (type I cards) to come out in the 1990s, but are now only mainly used in industrial applications and for I/O jobs (using types I/II/III), as a connection standard for devices (such as a modem). Also in 1990s, a number of memory card formats smaller then PC Card came out, including CompactFlash, SmartMedia, and Miniature Card. In other areas, tiny embedded memory cards (SID) were used in cell phones, game consoles started using proprietary memory card formats, and things like Personal digital assistants and digital music players started using removable memory cards.

From the late 1990s into the early 2000s a host of new formats would appear, including SD/MMC, Memory Stick, xD-Picture Card, and host of variants and smaller cards. The desire for ultra-small cards for cell-phones, PDAs, and compact digital camera s would drive a trend toward smaller cards that left the previous generation of compact cards looking big. In digital cameras SmartMedia and CompactFlash had been very successful, in 2001 SM alone captured 50% of the digital camera market and CF had a strangle hold on professional digital cameras. By 2005 however, SD/MMC had nearly taken over SmartMedia s spot, though not to the same level and with stiff competition coming from Memory Stick variants, xD, as well as CompactFlash. In industrial fields, even the venerable PC Card (PCMCIA) memory cards still manage to maintain a niche, while in cell-phones and PDA s, the memory card market is highly fragmented.

=Data table of selected memory card formats=

Since many EEPROM devices only allow a finite number of write cycles, some of these cards incorporate wear levelling algorithms to spread the wear and to avoid wearing out specific places which are often written to.

=Overview of memory card types=

*PCMCIA ATA Type I Flash Memory Card (PC Card ATA Type I) (max 8 GB flash as of 2005) **PCMCIA Linear Flash Cards, SRAM cards, etc. **PCMCIA Type II, Type III cards *CompactFlash® Card (Type I), CompactFlash High-Speed *CompactFlash® Type II, CF+(CF2.0), CF3.0 **Microdrive (max 6 GB as of 2005) *MiniCard (Miniature Card) (max 64 MB) *SmartMedia Card (SSFDC) (max 128 MB) (3.3V,5V) *xD-Picture Card, xD-Picture Card Type M *Memory Stick, Magic Gate Memory Stick (max 128 MB); Memory Stick Select, MagicGate Memory Stick Select (max 2*128 MB) **Memory Stick Duo Card, Magic Gate Memory Stick Duo (max 128 MB) *Memory Stick PRO Card, Memory Stick High-Speed (max 32 GB) **Memory Stick PRO Duo Card, Memory Stick Pro Duo High Speed *MultiMediaCard (7-pin), MMC plus (7/13-pin) (MMC4) **RSS-MMC, MMC mobile (RS-MMC4) **MMCmicro (aka S-Card) **SecureMMC *Secure Digital (SD Card), Secure Digital High-Speed, Secure Digital Plus/Xtra/etc (SD with USB connector) **miniSD Card **microSD Card (aka Transflash, T-Flash) *MU-Flash (Mu-Card) (Mu-Card Alliance of OMIA) *C-Flash *SIM card (Subscriber Identity Module) *Smart card (ISO 7810 Card Standard , ISO 7816 Card Standard, etc.) *UCF (USB FlashCard) (uses Universal Serial Bus) *FISH Universal Transportable Memory Card Standard (uses USB) *Sony PlayStation Memory Card, PlayStation PocketStation memory card, PlayStation 2 Memory Card *Microsoft Xbox Memory Unit (memory card) *Nintendo GameCube Memory Card 59, Memory Card 251, Memory Card 1019 *Nintendo 64 Controller Pak *Sega Dreamcast VMU memory card (Visual memory unit) *Disk memory cards: **Clik! (PocketZip), (100 MB PocketZip) **Floppy disk (LS120, 2-inch, 3.5-inch, etc.)

= See also =