Differential and difference equations are one of the most apt methods of measuring change. Be it for measuring the changes in investment returns or measurement of growth and decay, one might find the relevance of these equations everywhere. This book unfolds the innovative aspects of differential and difference equations which will be crucial for the progress of mathematics and physics in the future. This book strives to provide a fair idea about the types of equations like ordinary differential equations, partial differential equations, abstract differential equations, etc. This book is ideal for engineering students and scientists as well.