The embedded system (Firmware) industry has become the fastest growing industry on these days. The electronic industry has been further pushed up by introduction of microcontrollers, and microcontrollers are small, cheap, reliable and very light. These are routinely used for process control, production testing, scientific instrument recording, in store checkout system, in automobile and evaluation systems, medical monitoring etc...

Embedded means those programs which are permanently stored in the ROM memory with necessary control while booting, terminating, input/output procedures in the microcontrollers. These programs are introduced at the time of manufacture and cannot be altered in run time.