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.
We do know that the Sumerians developed a writing system known today as cuneiform. It flourished between 3100 and 2000BC. Although it fell into disuse after this time, scholars succeeded in deciphering it last century and today we can read all of the many thousands of surviving cuneiform inscriptions.