Just that really.
I am meaning when they started using it to mean "men and women" rather than when did the term "gender" emerge to refer to sex stereotyped roles etc.
Does anyone know if there's anything interesting/scholarly written about this (though I'd also be interested to know if anyone remembers being specifically told to use the term, or if they have seen a change through their working life)?
I cannot remember what was standard practice when I was younger (I'm early 50s) or if there was a change though my vague memory is that things used to say "sex: m/f".