A new model for task scheduling that dramatically improve the efficiency of parallel systems Task scheduling for parallel systems can be a swamp of heuristics, models, and methods have been developed over the last decade. New models, based on the investigation concept and basic principles of scheduling tasks, consider heterogenitas account, contention for resources communication, and processor involvement in communications. For those readers who may be new to task scheduling, the first chapter is very important. They serve as an excellent introduction to programming parallel systems, and their place in the context of task scheduling program parallelization process. The second part of the text examine both basic and advanced scheduling techniques, offering readers a thorough understanding of the principles underlying scheduling algorithms. Researchers and students in distributed and parallel computer systems will find that this text dramatically improves their ability to schedule tasks accurately and efficiently.