In many fonts, the number zero and the letter O are nearly identical. Aon-09 takes a hardline approach: The zero is typically rendered as a perfect oval or rectangle with a forward slash ( / ) running through it. The capital 'O' remains clean and unbroken. This distinction is vital for coding or displaying serial numbers.
Unlike neo-grotesques like Helvetica or Univers, which retain subtle optical adjustments, AON-09 leans heavily into . Every stroke—regardless of whether it belongs to an 'A', a 'O', or a '1'—maintains an identical visual weight. aon-09 font
To understand aon-09’s unique value, compare it to its rivals: In many fonts, the number zero and the