Work in the environment of GPSS World . Methodological instructions and tasks for laboratory work on the course "Computer modeling" is an indispensable resource for students and teachers immersed in the world of computer modeling. The authors, combining their knowledge and experience, have created a manual that not only explains the theoretical foundations, but also offers practical tasks that allow to consolidate the knowledge gained. The book focuses on GPSS World, a powerful modeling environment used in areas ranging from economics to engineering. GPSS (General Purpose Simulation System) allows users to create models of complex systems, making it an ideal tool for studying the dynamics of processes. The book details the main components of GPSS, its capabilities and application in real-world tasks. Readers will be able to learn how to create models, analyze them, and interpret results, which is an important skill in today's world where data plays a key role in decision-making. Who can like this manual? First of all, it is addressed to students of technical and economic specialties who study computer modeling . However, the book will also be useful to those who work in the field of system analysis, project management or explore various aspects of process optimization. Teachers will also find in it valuable materials for the preparation of laboratory work and course projects . The book will be of interest to both beginners and more experienced GPSS users, as it covers a wide range of topics and tasks. The topics raised in the book are diverse and relevant. The authors discuss not only the technical aspects of working in GPSS, but also broader issues such as modeling real-world processes, analyzing their effectiveness and optimizing them. These topics are important for understanding how theoretical models can be applied in practice, as well as for developing critical thinking and analytical skills. The book also highlights the importance of computer modeling in today's world, where complex systems require careful analysis and prediction of behavior. The style of the authors is distinguished by clarity and accessibility, which makes the material easy to perceive. They use examples from real practice, which helps readers better understand how to apply the knowledge they have gained. In addition, the book presents tasks that contribute to active learning and allow readers to independently explore the possibilities of GPSS. This makes the manual not just a textbook, but a real tool for the practical development of computer modeling. If you are looking for literature that will help you master computer modeling and learn how to work with GPSS, this guide will be an excellent choice. It will not only give you the necessary knowledge, but also inspire further research in this fascinating field. Work in the GPSS World environment is your key to understanding complex systems and a tool for their effective modeling. Do not miss the opportunity to immerse yourself in the world of computer modeling and discover new horizons!