Yes, that stood out to me too. I recall there being two competing camps in the mid 70's regarding whether to 'slash' the O's or the 0's. In search of who these

Yes, that stood out to me too. I recall there being two competing camps in the mid 70's regarding whether to 'slash' the O's or the 0's. In search of who these sides were, I came across http://www.circuitousroot.com/artifice/letters/characters/slashed-o/index.html#introduction http://www.circuitousroot.com/artifice/letters/characters/sl... which is a useful summary.