Coffee is a brewed beverage prepared from roasted seeds, commonly called coffee beans, of the coffee plant. Caffeinated coffee has a stimulating effect in humans. Today, coffee is one of the most popular beverages worldwide.
Coffee was first consumed in the ninth century, when it was discovered in the highlands of Ethiopia. From there, it spread to Egypt and Yemen, and by the 15th century, had reached Azerbaijan, Persia, Turkey, and northern Africa. From the Muslim world, coffee spread to Italy, then to the rest of Europe, to Indonesia, and to the Americas.