Mathematics
T1
The Bakhshali manuscript — carbon-dated by Oxford in 2017 to 224-383 CE — shows the dot used as a zero symbol in calculation. That makes it the earliest known dot-notation for zero, in any tradition. The dot eventually became the open circle 0 we use today; both descend through Arabic sifr to Sanskrit shunya, the empty.
From the source
“The dot is also used for another purpose, namely as one of the ten fundamental figures of the decimal system of notation ”
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