How was the specification written — according to GOST or in a free format? What sections did the specification consist of?

The specification can be written either according to GOST standards or in a free format, depending on the requirements of the organization or project.

If the specification is prepared according to GOST (for example, GOST 19.201-78 for software documentation), it usually includes the following sections:

• Introduction (purpose, scope)
• General description (functional capabilities, limitations)
• System requirements (functional, non-functional)
• Interfaces (user, hardware, software)
• Reliability and security requirements
• Testing requirements
• Appendices (glossary, references)

In a free format, the structure can be more flexible and adapted to specific needs, but usually includes a description of goals, functionality, limitations, and system requirements.

The choice of format depends on corporate standards, customer requirements, and project specifics.