What is the difference between Mrs., Ms., Miss., and ma' am?

Dear Ombada and friends,
Sorry not to have interacted earlier as I seem to have a problem posting
to the Board…
However:
Mrs.: is the form used as a title for married women followed by the husband family name or a hyphenated husband and wife family names as she chooses to call herself: (Mrs. Asha M. El Said-Abdel Hai) or (Mrs. Asha Musa El Said) or
(Mrs. Abdel Hai).
Ms. Is used when a woman chooses not to be identified as married or unmarried or we are not sure whether she is married or unmarried:
(Ms. Asha Musa El Said).
Miss. Is used for an unmarried lady, meaning that if she is divorced or widowed, she would still be called Mrs.
Ma’am: is short for Madam; and is used as polite form to address women (like Sir for men) especially at work places and the plural form is Mesdames and has nothing to do with being married or single. The origin of the word is French.
While: Madame, plural form Mesdames, is used for married women and the origin is French.
Mme: (You didn’t ask about this one, but) is short form for Mademoiselle and is the French call for an unmarried lady or a nanny!

All the above is according to my out-of-date knowledge of formal English, unaffected with modern and American ‘jargon’. I stick to RP English or Oxford English as used to be called.
Greetings to All.

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