If memory serves well, normal operator precedence was already present in the first FORTRAN, which was proposed in 1953. And APL's priority system is: there is

If memory serves well, normal operator precedence was already present in the first FORTRAN, which was proposed in 1953. And APL's priority system is: there is no priority. Everything is evaluated right to left. Pike's Ivy is no exception. 3/4 differing from 3 / 4 is a lexical convention: 3/4 is a rational number.