What inventions of the Arabs are still used by mankind?

The Arabs bought coffee beans from Ethiopia and taught Europeans to this drink. An Arab scientist conducted the research that led to the operation of the camera. The Arabs improved the rules of the game of chess that came from India. In 852, the scientist Abbas ibn firnas created and tested the prototype of the first parachute. The numbering order and algebra we use today originated in India, but improved and spread by the Arabs. They were the first to invent soap, fountain pen, check.