It presents a basic meaning for load engineering with their standardization for all fields. All materials have been simplified so that the reader can easily understand. Chapter 1 deals with the personal loads with a wide branch for classification. Chapter 2 presents the standard load curves besides the basic idea for standardization. Chapter 3 & 4 explain the simple load curves and the final classification for them. Chapter 5 the basic view for the distribution of loads in actual cases. The next chapter 6 presents the statistical study for the load curves since a lot of readings is found. The important subject in the book comes in the unity international network for the world and the final chapter presents an example for the pricing of energy in developing countries.