"Introduction to Microcontrollers and their Applications", discusses Microcontrollers and their applications with two most widely and universally used microcontroller families as basis. Its assimilation gives a head start to embark into Embedded Applications. The book is essentially aimed at senior under-graduates and graduates in Electronics and Computer related engineering streams as well as post-graduates in Applied Sciences. It is also useful for professionals in design and development areas as well as students in other engineering streams who seek microcontroller expertise for embedded applications. The book is an outgrowth of well-tested class-room and laboratory material.