Outside
From Hull AWE
Outside is sometimes used to mean "apart from", as in the sentence "In the United States, the Fahrenheit scale is still the norm, outside scientific writing."
Using the preposition "of" with this meaning is correct in American English, but not in British English. Groucho Marx once said: "Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read." We agree with him - but, to a pedant, it's not good grammar. Avoid outside of in British English.
