Questions to ask, always. Are capital and small letter I, large and small letter L, vertical bar |, and exclamation point !, clearly distinguishable. Same for

Questions to ask, always. Are capital and small letter I, large and small letter L, vertical bar |, and exclamation point !, clearly distinguishable. Same for zero, large and small o. Same for different brackets [ { ( <. Same for colon, semicolon, comma, period. If the font doesn't do this, then it's not very useful for programmers. Extra points if multiple underscores, as in __FILE__ are separated so you can in the example count that there are two underscores before and after FILE.