something about Al khawarizmi

Though you have done a good job but what you have written in your achievements of Al Khawarizmi would not qualify as achievements, as you have merely told that he was expert in these fields...
His Achievements:

1. He compiled the oldest Astronomical Tables
2. He is also the first person to use Zero
3. I his Book Kitab ul Jabr wal Muqabla, he is the first person to give analytical solutions of Linear and Quadratic Equaltions.
4. He invented the knowledge of Algorithm that is after his name Alkhawarizmi...
5. He and Nasiruddin Tusi are aptly considered the first to solve complex Trigonometric Theorems that remained unsolved since Archimedes...