1. Technical Writing 2. Manual Testing / Test Cases 3. Security Testing 4. Windows Server Administration 5. Linux Administration 6. Website Testing 7. Functional Testing 8. Regression Testing 9. Performance Testing 10. Mobile Application Testing 11. Automation Testing 12. Smoke and Sanity Testing 13. Integration Testing 14. System Testing 15. Business Scenario Testing 16. Platform Testing 17. Compatibility Testing 18. Localization Testing 19. System Integration Testing 20. Installation Testing 21. White box Testing 22. SOA / Web Services Testing