Computer Adapters We Use Everyday

Computer adapter is a device which converts incompatible signal or a connector to a compatible or usable form. We use adapters everyday, knowingly or unknowingly. For instance, you charge your mobile devices using a charger which is basically a power adapter. If you directly connect your device to the electric plug, you will end up frying it. The adapter used here is a power adapter. There are several other kinds of adapters like USB adapters, network adapters, video or audio adapters, connectors and many others. USB adapters are those which you use to connect your mobile to your PC. Network adapters or Ethernet adapters are simply routers and switches. Video adapters or multimedia adapters include TV Tuner cards and Video cards which process graphic data. Audio adapters are sound cards and connectors are those which connect two different devices. Despite not containing any electronic circuitry, connectors are sometimes referred to as adapters because of their behavior.
By: Sandeep Mahanthi

Secure Digital Card or SD card

Secure Digital card or SD card is a flash memory card that provides storage for portable various electronic devices like eBooks, digital cameras, PDAs, audio players, video recorders and mobile phones music players, camcorders and personal computers. SD cards are small in size, weighs approximately two grams and robust and have higher data transfer rates and low power consumption of primary energy, and mobile devices. It uses flash memory to provide non-volatile storage, which means that power is not necessary to retain stored data.
Secure Digital card is the size of postage stamp  It 'the same size as the MMC, but smaller than previous memory card types including Smart Media cards elderly and Compact Flash cards. Both MMC and SD cards can be encryption capabilities for protected content to ensure the secure distribution of copyrighted material, such as digital music, videos and books. SD cards are available with storage capacities up to 4 gigabytes.
Both MMC and SD card use metal connector contacts instead of the traditional pins and connectors, are therefore not subject to damage during handling

XQD - The high-End Memory

Many memory card formats have vanished unable to cope up with the taking over of SD cards. CompactFlash has managed to survive because of its high capacity and transfer rate. But to be competitive, it needed improvement.

The newly designed cards with XQD format use PCI express technology to achieve astonishing 2.5 GB per second transfer rate initially and 5 GB per second later. These cards will write data at a minimum speed of 125 MBps. CompactFlash cards found today top out at about 100MBps. CompactFlash card users will have a wide variety of memory options available. The new design will be licensed in early 2012