[rbanffy]

The 5100, 5110, and 5120 computers had a simple sans serif font, with a distinctive narrow zero. The 3270, 3150, and 5250 terminals also shared a very nice design (which was copied into x3270's), with distinctive 6's, 9's and the dotted rounded 0 (that made it easier to distinguish from the squarer O). The 3270 also had the peculiarity of having the digits being slighly taller than the letters.

I'm not sure which was the first machine that had the distinctive MDA look that flowed into CGA, EGA, and VGA. Could be something created for the PC.

If all else failed, it'd be nicer if they just did like Commodore and copied the Atari 8-bit one with wide stems. The NTSC output for the CGA board more or less mandated the wide stems to prevent color artifacts.