You would list each individually. Normally, the higher defree comes first. A post-doctorate professorship, is Ph.D. first, then earned degrees. Honorary degrees come last. An M.D. is a professional degree. If the M.D. goes to further school and becomes a professor in a med-school with a Ph.D. he would list the Ph.D. first.
A priest with an S.T.D., a doctor of sacred theology, he would have to have a Th.D., doctor of theology first. It's possible to earn a double doctorate, as in a Th.D. with a D.Div., then he would list the S.T.D. followed by his first major, which usually would be Th.D. first; listing the degrees as S.T.D., Th.D., D.Div.
'when more than one are' is the correct phrase.
It is the abbreviation when you refer to more than one Mister (Mr.).
Yes, there is more than one. Every state has an abbreviation.
Sts.
The common abbreviation used for "about" is "abt." but there is no abbreviation for "on" as it is too short to need one.
100.
"Messrs" is spelled as M-E-S-S-R-S, which is an abbreviation for "messieurs," a formal way of addressing or referring to more than one man.
There is no standard abbreviation in English for "cousins," because the word is so short that no abbreviation is usually needed.
You can find more than one, T ,TO, TOR, TR
I've sometimes used the abbreviation Rec'd. Yes, because an apostrophe indicates contraction: missing letter(s) -- in this case, the e, i, v, and last e. A writer would not want to use more than one apostrophe in a single word, hence: Recvd would logically be punctuated as: Rec'v'd -- requiring more than one apostrophe and more work than an abbrev. calls for! ;-) --Good question. Thanks for asking.
Yes in printing it is becoming more and more common to use M as an abbreviation for one thousand. However, recently I was getting a quote from Malaysia for a print job and they mistook it for Million. That would have been a huge mistake!
No, "you is" is not grammatically correct. The correct form is "you are" when referring to more than one person or "you are" when referring to one person.