What system? What standard fonts? My system has no standard fonts and I wouldn't want to use fixed-width fonts on a website anyways; I'd also be very unhappy if

What system? What standard fonts? My system has no standard fonts and I wouldn't want to use fixed-width fonts on a website anyways; I'd also be very unhappy if the website changed based on what device/system I'm using (I often don't have control over that device).