Pre-Mechanical Age (1 jan 3000 ano antes da era comum – 1 jan 1450 ano)
Descrição:
Keeping account of information included to pictographs and imagery. Usually non-formal accounts and writing dominates this time period for people not in ruling classes, generally literacy is low.https://ehs.siu.edu/_common/documents/IT%20newsletter/vol-2-no-29.pdf
Adicionado na linha do tempo:
Data:
1 jan 3000 ano antes da era comum
1 jan 1450 ano
~ 4452 years