Muqtis
Shiqtas
Kothwal
Patwars
Bhiktis
Iktas
Nadus
Vishayas
Iltutmish
Mohammad-Bin-Tughluq
Balban
Alauddin Khalji
Jalaluddin Khalji
a device to cultivate land
a device to lift water
a device to cut crops
a device to move load