The land revenue system adopted by Akbar was largely based on Sher Shah’s system. However Akbar introduced slight modifications and his system was called Zabti or Bandobast system, which was further improved by Raja Todar Mal.
Al Biruni was made court astrologer in Ghazni and he accompanied with Mahmud on his invasions on India. He lived for several years here and is considered to be first Indologist.
Ahmad Shah III was succeeded by Muhammad Shah III. He reigned for nearly 20 years. Through his extensive conquests he regained many lost territories, the most famous being his raid on Kanchipuram.