[rsynnott]

> it also facilitates legibility, especially at a slight distance, as well as distortion (squishing, stretching) if necessary

Except for the terrible, terrible ‘0’, which looks more or less identical to the ‘O’. IIRC sometimes similar fonts had a strike-through 0 for legibility; I think the BBC Micro keyboard did, for instance.

[bjclark]

The BBC Micro keycaps were made by Comptec (mentioned in the article) in Gorton Modified. Source: I work at signature plastics and have seen the original tooling for it.