Thanks I was looking at the answer and thinking it didn’t fit my memory. i’m sure most of mine were ACs. TBF with things like VPAM coming in the late 90s, you did have backspace and all sorts of stuff like that.

I still remember doing linear regression in a stats exam on i think a casio fx-115W something like that . Excellent calculator - but just no, it was time for some things to be on a real computer.