Because they revolutionized sciences of the time. They all discovered many new things in their respective fields that were way above the level of European scientists. For example, al-Khwarizmi discovered algebra and made textbooks on complex mathematics, while Al-Razi for example made new discoveries in the field of therapy and developed fields like ophthalmology and pediatrics. Their works were translated into Latin because of how advanced for the time they were.<span />
Its is a classic process synchronization problem and the problem describe tow process the producer and the consumer.
The Royal Road was an ancient highway<span>, part of the Silk Road and the Uttara Path </span>built<span> in ancient South Asia and Central Asia, reorganized and rebuilt by the Persian king Darius the Great (Darius I) of the </span>first<span>(Achaemenid) Persian </span>Empire<span> in the 5th century BCE. Darius </span>built<span> the road to facilitate rapid communication ..</span>
