Numerical digit
From India, the thriving trade between Islamic sultans and Africa carried the concept to Cairo. Arabic mathematicians extended the system to include decimal fractions, and Muḥammad ibn Mūsā al-Ḵwārizmī wrote an important work about it in the 9th  century. The modern Arabic numerals were introduced to Europe with the translation of this work in the 12th century in Spain and Leonardo of Pisa's "Liber Abaci" of 1201. In Europe, the complete Indian system with the zero was derived from the Arabs in the 12th century.
Napoleonic Code
A civil code with strong Napoleonic influences was also adopted in 1864 in Romania, and remained in force until 2011. The Code was also adopted in Egypt as part of the system of mixed courts introduced in Egypt after the fall of Khedive Ismail. The Code was translated into Arabic from the French by Youssef Wahba Pasha between 1881 and 1883. Other codes with some influence in their own right were the Swiss, German, and Austrian codes, but even therein some influence of the French code can be felt, as the Napoleonic Code is considered the first successful codification.