Sindh has Pakistan's second largest economy with Karachi being its capital that hosts the headquarters of several multinational banks. Sindh is home to a large portion of Pakistan's industrial sector and contains two of Pakistan's commercial seaports, Port Bin Qasim and the Karachi Port. The remainder of Sindh has an agriculture based economy, and produces fruit, food consumer items, and vegetables for the consumption other parts of the country. Sindh is also the centre of Pakistan's pharmaceutical industry.
Sindh is known for its distinct culture which is strongly influenced by Sufism, an important marker of Sindhi identity for both Hindus (Sindh has Pakistan's highest percentage of Hindu residents) and Muslims in the province. Several important Sufi shrines are located throughout the province which attract millions of annual devotees.
Sindh's capital, Karachi, is Pakistan's most ethnically diverse city, with Muhajirs, or descendants of those who migrated to Pakistan from India after 1947 and throughout the 1950s and 1960s, making up the majority of the population. Karachi and other urban centres of Sindh have seen ethnic tensions between the native Sindhis and the Muhajirs boil over into violence on several occasions. Sindh is home to two UNESCO World Heritage Sites – the Historical Monuments at Makli, and the Archaeological Ruins at Moenjodaro.
The word Sindh is derived from the Sanskrit term Sindhu (literally meaning "river"), which is a reference to Indus River. The official spelling "Sind" was discontinued in 1988 by an amendment passed in Sindh Assembly.
The Greeks who conquered Sindh in 325 BC under the command of Alexander the Great rendered it as Indós, hence the modern Indus. The ancient Iranians referred to everything east of the river Indus as hind. When the British came to India in the 17th century, they applied the Greek version of the name Sindh to all of South Asia, calling it India. Pakistan's name is derived from an acronym, in which the letter 'S' stands for Sindh.