Hi, English isn’t my mother tongue so I was asking myself that question since I first encounted a w/… Back then I was like: “What tf does ‘w slash’ stand for?” And when I found out I was like “How, why, and is it any intuitive?” But I never dared to ask that until now
I’m used to Dr., Mr., Mrs. all needing the dot.
I’d also add the medical ones which all use x, and most use the first letter of the word, but not all, so it’s kinda point 3, kinda not:
Both are possible: Dr and Dr.
Never heard of the x version. Very interresting.