Abbreviations in writing

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An abbreviation is a shortened version of a written word or phrase used to replace the original.  From this page, you can learn about the quirks associated with writing abbreviations.
 

 
Writing Abbreviations

An abbreviation can usually be placed into one of four categories: 

Acronym
Contraction
Initial abbreviation
Syllabic abbreviation

Acronym

An acronym is an abbreviation spoken like a word; e.g. BUPA, NAAFI. Through common usage, a number of acronyms have become words in their own rights. Good examples are sonar, radar, laser and scuba. (Nowadays, these are rarely capitalised.) Some acronyms have not yet made a full transition to 'recognised word' and can be written with all capital letters or just an initial capital letter; e.g., NATO or Nato.

Contraction

A contraction is an abbreviated version of a word or words. There are two main kinds: 

  Shortening a word or merging two words into one and replacing the missing letter(s) with an apostrophe, e.g., don't, can't, shouldn't. (See "Apostrophes replace missing letters".)

  Compressing a word, e.g., Mr, Revd, Prof. (See "Writing contractions".)

Initial Abbreviation (or Initialism)

Initialisms tend to be written with capital letters with each pronounced, e.g., BBC, CNN, LRS. These can be written with or without full stops (periods ), but a writer should be consistent throughout a document. However, when using company names, it is a common convention to copy the company's version. (For example, do not write B.U.P.A. - this company does not use full stops in its own correspondence.)

Syllabic Abbreviation

Syllabic abbreviations are not common. They use the initial syllables from multiple words, e.g., Combat (Komandir Batal'ona), Gestapo (Geheime Staats Polizei) Comintern (Communist International). 
grammar tips
SCIENTIFIC UNITS 

When using units such as mph or cm, you can either use a space after the number or not. The choice is yours. However, be consistent throughout your document. 

700mph, 99m, 10cm, -4°C 
700 mph, 99 m, 10 cm, -4 °C 

BE CONSISTENT

There are many different conventions relating to abbreviations. Therefore, the golden rule is simply:
"Pick a style you like and be consistent".

Associated lessons:
 
Using AD, BC, BCE and CE
Full stops (periods) in contractions
Forming the plurals of abbreviations
Using full stops (periods) in abbreviations
 
   

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