This book introduced an approach to design and implement a system to control the movement of wheelchair by means of the human voice for paralyzed patients. This book illustrates a robust algorithm for speech recognition, this algorithm used to identify the speaker (user) and the word to make the system more secure. Many and different features of sound were used and illustrated, Dynamic Time warping (DTW) method for matching process. This book is very helpful for whom interested with speech recognition and using the speech recognition for security applications. This book shows Microcontroller interfacing with PC and using Microcontroller with Motors.