Don’t think I’ve ever heard anyone say three point five" HDDS or read it in the decimal form-- Three and 5 tenths. It’s always said as the fractional form-- 3 1/2".
I think they mark them as 3.5" because it’s easier to typeset a decimal than fractions. Even those accursed 3 1/2" floppys seem to be marked 3.5" these days.
Don’t think I’ve ever heard anyone say three point five" HDDS or read it in the decimal form-- Three and 5 tenths. It’s always said as the fractional form-- 3 1/2".
I think they mark them as 3.5" because it’s easier to typeset a decimal than fractions. Even those accursed 3 1/2" floppys seem to be marked 3.5" these days.