Mesopotamia
Meso
Potamos
Sumerian Civilization
Advance Civilisation Building Cities
Supporting People
Irrigation System
Legal System
Administration
Postal Service
Measuring
Time
Angle
Geographic Coordinates
Akkadians
Abacus
Method of Arithmetic
Addition
Subtraction
Multiplication
Division
Writing Based
Cuneiform Sysbol
Clay Tablets
Sexagesimal Number
Vertical - the Character for 1
Horizontal - the Character for 10
60 Based system
Sexagenary