I recently had to pause to determine the difference between a lowercase ‘L’ and an upper case ‘i’ in an acronym. If you look carefully at the common fonts, Calibri and Arial you can see that in both typefaces, the two are identical.

So, I went looking for a typeface that better distinguished between the two. It would also be helpful if there was clear difference between a ZERO an ‘O’. And the only typeface (variable) I could find was Consolas.