Slashed 0 and Ø in nordic countries. Though not abiguous in sharing the exact same shapes, many characters can share similar structures that (arguably; citatio

Slashed 0 and Ø in nordic countries. Though not abiguous in sharing the exact same shapes, many characters can share similar structures that (arguably; citation needed) can cause visual confusion. For example; 3 and 8 in a typeface like Helvetica are very similar. Opening the aperture of the 3 or using a form with a corner in the upper right can be observed in some UI typefaces. The "single story a" can be an issue in typefaces that ise it, adding to the plethora of round forms (eopdqbc etc.). Breaking up the monotony of those shapes is also frequently advised. "Tail-less" t and r in sans type can be problematic at small sizes.