O
Octopus
My dad went to uni and got his degree in medicine, so he was Doctor.
My mum went to uni and got her degree in medicine, so she was a Doctor.
He was a consultant in chest medicine, she was an anaesthetist. Neither could do the job of the other, clearly! Different skill sets.
Hit, nail and head spring to mind ............... especially when you include all the "IT" type related skills that are needed with more and more of the products coming to the market these days ...............
The only "split" that would make ANY sense would be between single phase and multi phase .........................
Got me tin hat on.