Topic on Manual talk:FAQ

Wg stands for "Wikipedia global", before MediaWiki expanded beyond Wikipedia. That should always be asked in order to remember the name of a variable. It should be a FAQ.

That's more of a historical fact. Knowing that isn't really necessary. I could see people equally considering 'wg' as 'Wiki global' and not having any issues without knowing the historical fact.

Fine, lets see it in the FAQ with your answer, short and sweet "A. wg stands for a Global variable on the Wiki system."?
I believe mnemonics are an important learning tool, and that variable naming is necessarily a mnemonic except when it's an abbreviation or initialism like "wg". (The rest of the name of the variable, after the "wg" is already a mnemonic.)