A capitalized letter
An abbreviation is a shortened form of a word followed by a period. The word central does not have an abbreviation but a contraction, which is Ctr.
The abbreviation for number is No. (has a period at the end). Numbers plural is Nos. (again a period at the end).
It is widely accepted that the final period after the abbreviation does double duty in ending the sentence and the abbreviation at the same time.
Yes, in American English, a period should be included after the abbreviation "Inc." at the end of a sentence. It signifies the end of the abbreviation and the sentence.
In correct English, every abbreviation should have a period at the end
it is st. with a period at the end
No, you do not need to add an additional period at the end of a sentence that already ends with an abbreviation like Oct. The period from the abbreviation serves as the ending punctuation for the sentence.
Yes, usually there is.
No, you do not include a second period when a sentence ends with an abbreviation like "MD." Just one period is used to end the abbreviation and the sentence.
No. You put only one period.
Yes, the correct abbreviation requires a period at the end.
If a sentence ends with a.m. or p.m., there is no need for an additional period after the period that is already part of the abbreviation. The period at the end of a.m. or p.m. serves as the ending punctuation for the sentence.