Mr. = It is for both married man and single man.
Mrs. = It is for married woman only.
Ms. = It is for a woman who is not sure married or unmarried.
(It is also used for both married and unmarried woman.)
Miss = It is for a woman is not married.
Sr. = Senior ( It is used after a father's name when his son is given the same name.)
e.g. James Sr. (father)
Jr. = Junior ( It is used after a son's name when his father is given the same name.)
e.g. James Jr. (son)
Prof. = Professor
e.g. Prof. Smith (Prof. + Last name)
Dr. = Doctor (It is used for the doctors who work in hospitals)
(It is also used for the people who have Ph D.)
e.g. Dr. Smith (Dr. + Last name)
Mrs. = It is for married woman only.
Ms. = It is for a woman who is not sure married or unmarried.
(It is also used for both married and unmarried woman.)
Miss = It is for a woman is not married.
Sr. = Senior ( It is used after a father's name when his son is given the same name.)
e.g. James Sr. (father)
Jr. = Junior ( It is used after a son's name when his father is given the same name.)
e.g. James Jr. (son)
Prof. = Professor
e.g. Prof. Smith (Prof. + Last name)
Dr. = Doctor (It is used for the doctors who work in hospitals)
(It is also used for the people who have Ph D.)
e.g. Dr. Smith (Dr. + Last name)