Memory cards form the basis of all digital devices that need some sort of resident storage memory on board. For instance, new age digital cameras and mobile phones replace the photo film with cards to store images. You can delete the unwanted images and save the desired ones on to a computer and then write them on a CD. A memory card, in theory can be reused for an infinite number of times. These cards are based on flash memory technology and the best part about using flash memory sticks is that they not only reduce the size of the circuitry enormously, but they are also relatively stronger than contemporary storage devices.
Flash memory devices such as memory cards use no moving mechanical parts, thus, the wear and tear of the storage equipment is almost negligible and you can be rest assured that your flash stick would be up and running, even after years. Apart from phones and cameras, these cards are finding usage within pen drives, laptops and other electronic devices as well. Competition among manufacturers and reduction of cost of raw materials (semiconductor circuitry and chips) have resulted in a constant increase in the storage capacity of these cards at an exorbitantly low cost.
New age cards, which come in liquid and semi-solid forms are also available these days. Although, such cards employ technically more advanced equipment as compared to flash memory, yet they are easy to use and have a decent storage capacity. Such cards are referred to as mem-cads by geeks and the tech-savvy people, who generally use them. Power free storage capacity, compact size and ease of operation, apart from dependability, have made these cards a must-have storage device for almost everyone today. With SD/MMC and XD variants already in the market, the future promises to be bright for memory cards and people using them.