○○○ Kamares ⪢⪢
In the Egypt of those times, merchants traded exclusively beautiful vases now known as _____ .
http://qindex.info/i.php?x=24348

• 0750± positional notation
By the 8th century, Indian mathematicians had perfected positional notation and over the next several centuries, Arab merchants, scholars and conquerors began to spread it into Europe. -- vigesimal, Maghreb, Hebrew, glyph, Aztecs, duodecimal, sexigesimal
http://qindex.info/i.php?x=4984

• In between years
merchantilism
http://qindex.info/i.php?x=827

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