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Tokens — Data storage

InventTable — TOKENS ERA — Data storage

InventionDescriptionYearInventorCountry
Solar calendar engraved on bone 10,000 BCE France
Clay token system proto writing system 7500 BCE Mesopotamia
Map painted on wall 6500 BCE Catalhoyak, Turkey

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Leo Dean Jansen

Leo Dean Jansen, MD is a retired orthopedic surgeon with a special interest in the history of technology.  This web page is the culmination of  his efforts to define and organize the history of technology as seen through 2000 inventions.  TECHNOLOGY:  TABLE, TRUTHS, TIMELINE, TOP 100 represents the 4 parts of this project.

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