Volume B refers to the supplementary educational material titled "Informatics," which was added during the 2019-2020 school year to the teaching package of the Informatics course taught in the orientation group "Economics & Informatics Studies" of the 3rd grade of day high schools, as well as in the 4th grade of evening high schools.

- It contains all the theory of the school book "Informatics" according to the 2019-2020 syllabus presented in a question-answer format.
- The solutions to the exercises are in a separate insert that accompanies the main book.
- It consists of 8 chapters and is organized into 14 lessons, each referring to and analyzing in detail a specific subject of the exam material.
- There are methodologies useful for solving exercises, examples, and solved exercises with appropriate explanations.
- The exercises are specialized and grouped into true/false questions, multiple-choice, fill-in-the-blank, matching, value display, conversion, error finding, and problem-solving.
- The questions and exercises for solving are ranked according to the difficulty level, which is indicated with appropriate markings (easy-medium-hard-very hard).
- There are special boxes with highlights and remarks.
- It includes topics from national exams.
- At the end, there is a review guide that includes:
3 review assessment criteria and
40+1 proposed topics at the level of national exams.