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.
Writing was invented by the Sumerians around 3100 BC. It began as record keeping for trade and evolved into the use of symbols for writing down laws and stories. The form of writing is called cuneiform. Pictograms, or drawings representing actual things, were the basis for cuneiform writing.