This book is designed to cater the needs of the under graduate science and engineering students. It contains with the fundamental concepts related to Laplace Transformation and Inverse Laplace Transformation. The author utilized lucid style to explain the concepts. Also, the applications related to solving the Differential Equations, System of Differential Equations, Integral Equations and Partial Differential Equations are provided. The book contains with more number of examples and many exercise problems with key.