Volume A was written for the needs of the nationwide exam subject "Informatics" taught in the 3rd grade of day and evening General High Schools. It consists of 9 chapters and is organized into 20 lessons following the new teaching guidelines. Each lesson refers to a unit of the school book, initially presenting the corresponding theory with useful methodologies and examples, and then solved exercises and exercises for solving.

The book contains:

•  All the theory from school books in a question-answer format
•  Examples and methodologies
•  Solved exercises
•  New type of exercises for solving
•  Topics from nationwide exams
•  Evaluation criteria according to the new grading system
•  A separate 112-page booklet with the solutions to the exercises