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.
Sumer, an ancient civilization of southern Mesopotamia, is believed to be the place where written language was first invented around 3200 BC. Limestone Kish tablet from Sumer with pictographic writing; may be the earliest known writing, 3500 BC.