The main objective of writing this book has been to produce a good textbook from the student's point of view. The author has been teaching courses in Electronics at undergraduate level for several years. His experience as instrument engineer in the industry also helped to introduce and explain terminology and definitions as needed, placing emphasis on the topics considered most appropriate. The materials are arranged for ease of understanding. The first three chapters deal with the fundamentals of Electronics and will be useful to those taking their first course in the subject. The remaining chapters contain what is required at undergraduate level. Topics like integrated circuits, microprocessors, digital memories etc. are adequately treated. The author believes that the book will also be useful to teachers in the field of Electronics Engineering.