When jerry announces he's planning to major in mechanical engineering, his proud parents are not surprised. they tell their friends, "we knew he was destined to be interested in mechanical things. even as a tiny infant he loved mechanical toys and never gave his stuffed animals a second look! he's always been our little engineer." what does research on the psychology of gender development have to say about jerry's parents' conclusion?

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.