When you or someone you are caring for is seriously ill, it is recommend that you keep EOBs for five years after the illness or condition is alleviated. If you or the patient is claiming or has claimed a medical deduction, keep the explanation of benefits for seven years.
The earliest writing can be traced to Sumer, in Mesopotamia. This system did not use an alphabet, instead it used pictographs which are symbols representing familiar objects. This type of writing was called cuneiform, or wedge-shaped writing. Egyptians used hieroglyphics, also a pictograph system.
While the cuneiform writing system was created and used at first only by the Sumerian, it did not take long before neighboring groups adopted it for their own use. By about 2500 BCE, the Akkadian, a Semitic-speaking people that dwelled north of the Sumerians, starting using cuneiform to write their own language. However, it was the ascendency of the Akkadian dynasty in 2300 BCE that positioned Akkadian over Sumerian as the primary language of Mesopotamia.