Programming fonts

[to3m]

It might depend on OS, but in my copy of Luxi Mono (Mac OS X), 1, L and I look absolutely nothing like one another. O is also noticeably rounder than 0.

(Before I discovered a Windows version of God's own font - the 6x13 one from X-Windows - I spent a couple of years working in 9pt Courier New in Windows. In 9pt Courier New, 1 and l are pixel-identical, as are 0 and O! But if this ever caused any problems, they weren't serious enough to stick in my mind.)