Dr Space Junk Vs The Universe Archaeology And The

Recently, I was reading articles on the net and realised that there is a lot of ambiguity over the usage of Dr. Observations indicate, I think when you use "Dr" or "Dr's" (with or without the period) as an abbreviation for Doctor, it's fine if used in an informal setting. Additionally, I'm searching for two words that adequately describe and differentiate between the following two categories/groups of words, given they exist in english: Ms, Mr, Mrs, Miss etc. Furthermore, Tl. These findings regarding Dr Space Junk Vs The Universe Archaeology And The provide comprehensive context for understanding this subject.