Pakistan has over 60 languages spoken but its official language is English, while Urdu is the national language. It has a democratic parliamentary system where the president is head of state and the prime minister usually leads the largest party. Islam is the dominant religion and Pakistan has the second largest Shia population. The country varies geographically from northern highlands to the Indus River plain and Balochistan Plateau, with Islamabad as its capital. Pakistan has transitioned to a service-based economy from agriculture and received foreign investment in industries such as telecommunications and energy.