The full stop (.)
 
A full stop is used:
 
- at the end of a sentence if it is a complete statement:

• Her name is Susan and she lives in London.
• They decided to skip lessons and go shopping instead.

- at the end of a group of words that do not form a complete sentence in order to put special emphasis on a statement:

• And then he shouted her name. Over and over again.

- in some abbreviations; this applies especially when the abbreviation consists only of the first part of a word and more than two letters:

• etc.
• Dec.
• a.m./p.m.
• e.g.
• i.e.

NB: In British English, there is no full stop in Mr/Mrs/Ms, Ltd, kg and all abbreviations that consist of the first and last letters of a word.
If the abbreviated word is represented by initials, we do not put a full stop after them either:

• BBC
• US
• UK
• NATO

If an abbreviation with a full stop comes at the end of a sentence, we do not put an additional full stop after that:

• For our gardening course, we are going to supply all the equipment you will need, such as spades, rakes, buckets, etc.