Datacard types

Datacards can be sorted by their purposes:

  1. Expansion cardprinted-circuit board: inserted in a special slot in the device and used to add functions to this device;
  2. Memory card or flash card: a card which is inserted into the corresponding device socket and used for data storage and transmission;
  3. Identification card: a card that works by a contact/contactless interface and contains the data used for performance of various functions, for example access control in subway or offices. It is also used for prepaid services like banking and telecom;
  4. Datacard or "electronic card": a card dealing with e.g. geographical, climatic, road or topographical data to be displayed on the video screen of some device (computer or GPS navigator), or represented otherwise to be more convenient to use in a certain situation (for example, navigator’s vocal instructions).

Expansion cards


The expansion card in the computer is equipped with contacts on one of its edges, and it can be inserted into the motherboard slot socket.

There are various types of expansion cards:

  • A videocard transforms data from the computer memory into the video signal for the monitor. The videocard has its own processor, relieving the CPU of the computer;
  • A sound card enables the computer to work with sound;
  • A network card enables the computer to interact on a local network.

Memory cards

Flash cards

Many modern devices demand non-volatile memory requiring low power. Flash memory is used for these purposes. It is widespread in digital portable devices such as photo and video cameras, dictaphones, MP3 players, handheld computers, mobile phones, and also in smart phones and communicators. It is used for storage of the built-in software in various devices (like routers, mini-phonestations, printers, scanners, modems and controllers).

In recent years USB flash-drives have become more popular and have almost replaced diskettes and CDs.[citation needed] Flash memory is well known from its use in USB flash-drives.

Flash cards also are based on flash memory, such as Secure Digital (SD), Compact Flash and Memory Stick. These are much used in portable devices (cameras, mobile phones). Flash memory constitutes the biggest part of the portable data device market.



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