Datacard

A datacard is an electronic card for data operations (storage, transfer, transformation, input, output).

Datacards can be sorted by their purposes:

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:

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. 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.

Contact smart cards (with chip) have a contact zone consisting of a few small contact petals. When the card is inserted into the reader, the chip connects with the card reader which can then read and write information. The standard ISO/IEC 7816 also regulates data exchange protocols and some aspects of work with other smart card data.

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Wikipedia