Before “dot com” was part of our vernacular, how did we refer to release numbers? Was it “Windows three dot one” or “Windows three point one”? I remember using “dot” for filename extensions: “dot exe file” and it’s very common in Unix to have “dots”. But when I heard someone today say “three dot one” to refer to a release, I wondered if we used to say “point”. Or were they just used interchangeably? I have a bet with myself that I used to say “point” and didn’t use “dot” until domain names infiltrated our language. But I think the real answer is that we most often dropped the period and just said “three one”.