Functional requirements include: - Two-factor authentication - Data encryption in the database to prevent unauthorized copying - Sorting in ascending and descending order - Support for Windows and Linux OS - Use of HTTPS protocol for data exchange - Export in PDF and Word formats

Functional requirements include those that describe specific functions and behaviors of the system, that is, what the system should do.

From the list:

• Two-factor authentication
• Sorting in ascending and descending order
• Export in PDF and Word formats

are functional requirements.

The other items relate to non-functional requirements:

• Data encryption in the database to protect against unauthorized copying (security)
• Support for Windows and Linux OS (compatibility)
• Use of HTTPS protocol during data exchange (security, communication)

Thus, functional requirements describe specific actions and capabilities of the system, while non-functional requirements refer to qualities and constraints.