However , differences remained in the order of the keys and the number of characters .
When Urdu was declared as the national language of the independent Pakistan in 1947 , a variety of keyboard designs were quickly brought into the market by various individuals and organisations .
Differences remained in the order of the keys and the number of characters .
When Urdu was declared as the national language of the independent Pakistan in 1947 , a variety of keyboard designs were quickly brought into the market by various individuals and organisations .