The purpose of this book is to help students in the Science and Technology direction of the 3rd grade of high school in their effort to understand the material taught and examined and to practice it. At the same time, it is an important tool in the hands of colleagues, which will simplify their difficult work. Specifically, the book contains:

- Concise theory, many solved exercises and examples for consolidation, observations and comments on the systematic handling of various topics.
- Comprehension questions and exercises for solution at the end of each unit.
- Review topics solved and to be solved, as well as tests at the end of each chapter.
- Comprehensive review tests.

Our effort aims to ensure the success of students in the National Examinations, as well as the substantive understanding of these fundamental chapters. [...]

(from the authors' preface)