Answer:
1. Word processing
2. Spreadsheet creation and analysis
3. Database management
4. Presentation creation and delivery
5. Graphic design and editing
6. Video editing
7. Music production
8. Web browsing
9. Email management
10. Project management
11. Time tracking and monitoring
12. Accounting and financial management
13. Inventory and supply chain management
14. Human resources management
15. Customer relationship management
16. Sales management
17. Marketing management
18. Education and training
19. Healthcare management
20. Scientific research and analysis