Beginning about 3500 BC, clay tokens were gradually replaced by number signs impressed with a round stylus at different angles in clay tablets (originally containers for tokens) which were then baked.
Dǎɣ aywadan dǎɣ 3500 aɣ. J.-Ə. ihomiši, erkišiɣilan ən talaq aqalan anilkaman dǎɣ amiskal dǎɣ liɣitan ən numérique izgarnen dǎɣ tadhil ən əmik awilaywaynen dǎɣ tisigwen fal tisayen ən talaq (dǎɣ santo ən tisitwir fal krimkraman) wi eqalnen darat awen aygan.