Made new systems, like the tax collecting systems or splitting the huge empire into separate states called satrapies. Came up with the idea of world domination
ice cream
Suicide bombing is a Muslim invention in military science. Muslims boast about their ancient and medieval inventions, but they stole them from the Greeks, Persians and Egyptians.
There were many inventions in ancient Persia. Some of them included the vertical windmill, monumental buildings, and the Royal Road from Lydia to Susa.
inventions
What are some Mohawk inventions
What are some of the inventions of the akkadians?
What are some small and unknown inventions?
Some useful inventions are the light bulb, wheel, and the telephone.
You can find some inventions in the Wikipedia article "List of inventions".
Some inventions from 2000-2011 are the iPhone and the iPad.
Benjamin Franklin's inventions were numerous. Some of those inventions were bifocals, swim fins, the lightening rod, the Franklin stove, and the odometer.
See: http://www.whitehat.com.au/Australia/Inventions/InventionsA.html
Some inventions of the sumerians were the wheel, clay, and mud bricks