Abbreviations. In addition to ending a sentence, the period is used with certain abbreviations. The current style is to use periods with most lowercase and mixed-case abbreviations (examples: a.m., etc., vol., Inc., Jr., Mrs., Tex.)
A full stop is used after some abbreviations. If the abbreviation ends a declaratory sentence there is no additional period immediately following the full stop that ends the abbreviation (e.g. "My name is Gabriel Gama, Jr.").
No. A sentence should never have two periods at the end. If a sentence ends with an abbreviation followed by a period, do not add an additional period: She explained the rules for periods, commas, semicolons, etc.
Abbreviations and End Punctuation
If you end a sentence with an abbreviation containing a period, do not put another period at the end of the sentence. However, if a sentence ends in an exclamation mark or a question mark, include both the abbreviation's period and the end mark.
Note also that, when an abbreviation comes at the end of a sentence, only one full stop is written. You should never write two full stops in a row.
Titles after names: Sr., Jr., Ph. D., M.D., B.A., M.A., D.D.S. These are standard abbreviations, with periods.
Acronyms that abbreviate three or more words are usually written without periods (exception is U.S.S.R.). Abbreviations should only be used if the organization or term appears two or more times in the text.
When you end a sentence with an abbreviation, you don't need an extra period. The period that ends the abbreviation also ends the sentence. Think of it as an environmentally friendly rule—one dot of ink serves two purposes.
To form the possessive of any acronym, including those ending in S, add an apostrophe and an s. Therefore, the possessive form of UN is UN's, and the possessive of OAS is OAS's. By contrast, to make an acronym plural add an s without an apostrophe. It is best to avoid using too many acronyms in formal academic prose.
In a sentence, add a comma after Jr. or Sr. if words follow; the suffix is parenthetical: Sammy Davis, Jr., was a member of the Rat Pack.
Junior, when spelled out, is written with a lower case j. The wife a man who uses a suffix, uses the same suffix after her name: Mrs. John M. Baxter, Jr.
In short, the general modern style is to write names such as “Martin Luther King Jr.” without the comma — that's what you'll see in private newspapers and websites — but if you write for a government publication or website that follows USGPO style, you should include the comma before “Jr.” because that's how that style ...
From Behind the Name: "Junior is used to distinguish a son with the same name as his father. The following conditions apply: The Junior must be a son of the father, not a grandson. The names must be exactly the same, including the middle name.
Usually, the suffix Jr. is used for a baby boy who has the same name as his father, while II is used when a baby boy is named for a male relative other than the father.
(3) junior year, and someone in their third year is a junior. Junior can be abbreviated as "jr." in writing. (4) senior year, and someone in their fourth year is a senior. Senior can be abbreviated as "sr." in writing.
When you use an apostrophe to show ownership of something, you need to know how many items there are. When an item belongs to one item/acronym (singular), you add an apostrophe and an 's' to the acronym. For example: The TES's story about the UFOs was interesting.
To show possession using an apostrophe, add 's for individuals (“Smith's car”) and just the apostrophe after the s for plurals (“the Smiths' car,” “the Martinezes' dog”). By convention, names from classical mythology and the Bible ending in s show possession with the apostrophe only (“Jesus' teachings”).
The plural of Jones is Joneses, ‐es being added as an indicator of the plurality of a word of which the singular form ends in s, as in dresses or messes. The apposition of the much misused apostrophe to the word Jones does not pluralize it.
AP Style tip: Abbreviate junior or senior as Jr. or Sr. only with full names and don't precede by a comma: Martin Luther King Jr. I still like the comma.
The AP Stylebook holds that you should abbreviate “junior” and “senior” as “Jr.” and “Sr.” only with full names of persons or animals.
The period is also known as a full stop because it signals a speaker or reader that the sentence has come to an end. Examples: The dog is brown. My sister's name is Lisa.
They signal either that something has been omitted from quoted text, or that a speaker or writer has paused or trailed off in speech or thought.
Those little dots often found in a sentence or quote are called an ellipsis. The term ellipsis comes from the Greek word meaning 'omission,' and that's just what it does: an ellipsis shows that something has been left out.
The ditto mark is a shorthand sign, used mostly in hand-written text, indicating that the words or figures above it are to be repeated. '' Ditto mark. In Unicode. U+0027 ' APOSTROPHE (×2)