History.                                              Historically, the Punjab region has been part of Sindu Sapta the term meaning (7 Rivers) but in the course of time southern Sindh was shrieked to a small province and Punjab became a larger and more prosperous region of the area. The word Punjab was introduced by the by the Mughals in the 17th Century AD. It is a combination of the Persian words panj (five) and (water), thus the (land of) five rivers. The five rivers which flow thru Punjab are the tributaries of the Indus River namely Chenab, Jhelum, Ravi, Sutlej and Sindhu river itself. In the Rigveda, the sacred text of Vedism, the Punjab region is associated with the ancient Sapta Sindhu, the Land of Seven Rivers, whilst the later Greeks referred to Punjab as Pentapotamia, an inland delta of five converging rivers. The British used to call Punjab "Our Prussia."Most of Pakistanis outside Pakistan come from this province.