Group+Four

__Group 4__ 1. Banking System 2. Irrigation Techniques and Underground Wells 3. Hospitals 4. Algebra 5. Bookmaking 6. Herbal Medicines and Pharmacies 7. Astronomy 8. Libraries of Cordoba 9. Zoology 10. Music of Andulusia 11. House of Wisdom 12. Geometric and Floral Design 13. City of Baghdad 14. Calligraphy 15. Chess 16. Polo