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.
The Sumerian language is one of the earliest known written languages. The proto-literate period of Sumerian writing spans c. 3,300 to 3,000 BC. In this period, records are purely logographic, with no linguistic or phonological content.The oldest document of the proto-literate period is the Kish tablet.he cuneiform script is adapted to Akkadian writing from the mid third millennium. Our knowledge of Sumerian is based on Akkadian glossaries. During the  Sumerian Renaissance  (Ur III) of the 21st century BC, Sumerian is written in already highly abstract cuneiform glyphs directly succeeded by Old Assyrian cuneiform.