Monaco

Monaco is a monospaced sans-serif typeface designed by Susan Kare, Kris Holmes, and Charles Bigelow. It ships with macOS and has been present in all releases of Macintosh system software since the first Macintosh in 1984. Characters are distinct, and it is difficult to confuse 0 (figure zero) and O (uppercase O), or 1 (figure one), | (vertical bar), I (uppercase i) and l (lowercase L). A unique feature of the font is the high curvature of its parentheses as well as the width of its square brackets, the result of these being that an empty pair of parentheses or square brackets will strongly resemble a circle or square, respectively. Monaco has been released in at least four forms. The outline form of Monaco is loosely similar to Lucida Mono and created as a TrueType font for System 6 and 7. The original bitmap Monaco came in 9- and 12-point sizes.

From the Wikipedia article “Monaco (typeface)”, licensed under CC BY-SA 4.0.

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