Kindly reply fast as soon as possible..
can we connect a rfid reader with over android tablet pc directly from usb or bluetooth??

if yes, so which rfid reader will be used for it?

my next question is...
does parallex rfid reader supports android ? or just windows & linux OS?

The answer is "it depends". Android IS Linux, with some additional cruft, such as the Dalvik virtual machine (Google's version of Java). If the kernel has been compiled with the appropriate drivers, then you should be fine. If not, then you may need to spin a custom kernel build, and install the needed support tools for the device. Most should be seen by the OS as a serial device. Contact the manufacturer and see what they say about generic Linux support.

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