An abbreviation (from Latin brevis meaning short is a shortened form of a word or phrase Usually, but not always, it consists of a letter or group of letters taken from the word or phrase. For example, the word abbreviationcan itself be represented by the abbreviation abbr. abbrv.or abbrev. In strict analysis, abbreviations should not be confused with Contraction (grammar) or Acronym and initialism (including initialisms), with which they share some semantic and phonetic functions, though all three are connoted by the term "abbreviation" in loose parlance.lt;/ref>n abbreviation is a shortening by any method; a contraction is a reduction of size by the drawing together of the parts. A contraction of a word is made by omitting certain letters or syllables and bringing together the first and last letters or elements; an abbreviation may be made either by omitting certain portions from the interior or by cutting off a part; a contraction is an abbreviation, but an abbreviation is not necessarily a contraction. However, normally acronyms are regarded as a subgroup of abbreviations (e.g. by the Council of Science Editors).

History

Abbreviation has been used as long as phonetic script existed, in some senses actually being more common in early literacy, where spelling out a whole word was often avoided, initial letters commonly being used to represent words in specific application. By classical Greece and Rome, the reduction of words to single letters was still normal, but can default. An increase in literacy has, historically, sometimes spawned a trend toward abbreviation. The standardization of English in the 15th through 17th centuries included such a growth in the use of abbreviation.http://www.spellingsociety.org/journals/j7/shortcuts.php Spelling Society : Shortcuts 1483-1660] At first, abbreviations were sometimes represented with various suspension signs, not only periods. For example, specific phoneme sets like "er" were dropped from words and replaced with ɔ, like "mastɔ" instead of "master" or exacɔbate instead of "exacerbate". While this seems trivial, it was symptomatic of an attempt by people manually reproducing academic texts to reduce their copy time. An example from the Oxford University Register, 1503: In the 1830s in the United States, starting with Boston, abbreviation became a fad For example, during the growth of philology linguistic theory in academic Britain, abbreviating became very trendy. The use of abbreviation for the names of "Father of modern etymology" J. R. R. Tolkien and his friend C. S. Lewis and other members of the Oxford literary group known as the Inklings are sometimes cited as symptomatic of this. Likewise, a century earlier in Boston, a fad of abbreviation started that swept the United States, with the globally popular term OK generally credited as a remnant of its influence.lt;/ref>lt;/ref> After World War II the British greatly reduced their use of the full stop and other punctuation points after abbreviations in at least semi-formal writing, while the Americans more readily kept such use until more recently, and still maintain it more than Britons. The classic example, considered by their American counterparts quite curious, was the maintenance of the internal comma in a British organization of secret agents called the "Special Operations, Executive — "S.O.,E" — which is not found in histories written after about 1960. But before that, many Britons were more scrupulous at maintaining the French form. In French language the period only follows an abbreviation if the last letter in the abbreviation is notthe last letter of its antecedent: "M." is the abbreviation for "monsieur" while "Mme" is that for "madame". Like many other cross-English Channel linguistic acquisitions, many Britons readily took this up and followed this rule themselves, while the Americans took a simpler rule and applied it rigorously. Over the years, however, the lack of convention in some style guides has made it difficult to determine which two-word abbreviations should be abbreviated with periods and which should not. The U.S. media tend to use periods in two-word abbreviations like United States (U.S.), but not personal computer (PC) or television (TV). Many British publications have gradually done away with the use of periods in abbreviations completely. Minimization of punctuation in typewritten matter became economically desirable in the 1960s and 1970s for the many users of carbon-film IBM Selectric typewriter#Ribbons since a period or comma consumed the same length of non-reusable expensive ribbon as did a capital letter. Widespread use of electronic communication through Mobile_phone#Mobile_phones_in_society and Internet#Social_impact during the 1990s allowed for a marked rise in colloquial abbreviation. This was due largely to increasing popularity of textual communication services such as Instant messaging and text messaging Short Message Service for instance supports message lengths of 160 characters at most (using the GSM 03.38 character set). This brevity gave rise to an informal abbreviation scheme sometimes called SMS language with which 10% or more of the words in a typical SMS message are abbreviated.Crystal, David. Txtng: the Gr8 Db8 Oxford: Oxford University Press, 2008. ISBN 978-0-19-954490-5 More recently Twitter a popular social network service began driving abbreviation use with 140 character message limits.

Style conventions in English

In modern English there are several conventions for abbreviations and the choice may be confusing. The only rule universally accepted is that one should be consistent,and to make this easier, publishers express their preferences in a style guide Questions which arise include those in the following subsections.

Lowercase letters

If the original word was capitalized, then the first letter of its abbreviation should retain the capital, for example Lev. for Leviticus. When abbreviating words spelled with lower case letters, there is no need for capitalization.

Periods (full stops) and spaces

A period (full stop) is sometimes written after an abbreviated word, but there are exceptions and a general lack of consensus about when this should happen. There is some confusion over the strict distinction between an abbreviation (a word shortened by omission of its endpart) — requiring a full point (or full stop or period) — and a Contraction (grammar) (a word or compound shortened by omission of a middlepart) — which does not need a full point or period. American English usage is less strict about this distinction and thus more likely to conclude a contraction , e.g., Jr.for "Junior" with a period. In British English according to Hart's Rules the general rule is that abbreviations terminate with a full stop (period), whereas contractions do not.lt;/ref> | class"wikitable" border"1" |- !Example !Category !Short form !Source |- |Doctor (title) |Contraction |Dr |D–r |- |Professor |Abbreviation |Prof. |Prof... |- |The Reverend |Contraction (or Abbreviation) |Revd (or Rev.) |Rev–d |- |The Right Honourable |Contraction and Abbreviation |Rt Hon. |R–t Hon... |} In American English the period is usually added if the abbreviation might otherwise be interpreted as a word, but some American writers do not use a period here. Sometimes, periods are used for certain initialisms but not others; a notable instance in American English is to write [[United States]] [[European Union]] and [[United Nations]]as U.S. EU and UNrespectively. A third standard removes the full stops from all abbreviations (both "Saint"and "Street"become "St". The U.S. Manual on Uniform Traffic Control Devices advises that periods should not be used with abbreviations on road signs, except for cardinal directions as part of a destination name. (For example, "Northwest Blvd" "W. Jefferson" and "PED XING"all follow this recommendation.) Acronym that were originally capitalized (with or without periods) but have since entered the vocabulary as generic words are no longer abbreviated with capital letters nor with any periods. Examples are sonar radar lidar laser SNAFU and Scuba set Spaces are generally not used between single letter abbreviations of words in the same phrase, so one almost never encounters "U. S.". When an abbreviation appears at the end of a sentence, use only one period: The capital of the United States is Washington, D.C.

Plural forms

To form the plural of an abbreviation, a number, or a capital letter used as a noun, simply add a lowercase sto the end. * A group of MPs * The roaring 20s * Mind your Ps and Qs To indicate the plural of the abbreviation of a unit of measure, the same form is used as in the singular. * 1 lb or 20 lb. * 1 ft or 16 ft. * 1 min or 45 min. When an abbreviation contains more than one full point, [[Harts Rules]] recommends to put the safter the final one. * Ph.D.s * M.Phil.s * the d.t.s However, subject to any house style or consistency requirement, the same plurals may be rendered less formally as: * PhDs * MPhils * the DTs. (This is the recommended form in the New Oxford Dictionary for Writers and Editors) According to Harts Rules, an apostrophe may be used in rare cases where clarity calls for it, for example when letters or symbols are referred to as objects. * The xs of the equation * Dot the is and cross the ts However, the apostrophe can be dispensed with if the items are set in italics or quotes: * The x of the equation * Dot the is and cross the ts In Latin, and continuing to the derivative forms in European languages as well as English, single-letter abbreviations had the plural being a doubling of the letter for note-taking. Most of these deal with writing and publishing. A few longer abbreviations use this as well. | class"wikitable" border"1" |- !Singular abbreviation !Singular Word !Plural abbreviation !Plural Word !Discipline |- |d. | didot |dd. | didots | typography |- |f. | following line or page |ff. | following lines or pages |notes |- |h. | hand |hh. | hands | horse height |- |l. | line |ll. | lines |notes |- |MS | manuscript |MSS | manuscripts |notes |- |op. | opus |opp. | opera |notes |- |p. |page |pp. | pages |notes |- |P. |pope |PP. |popes | |- |s. (or §) |section |ss. (or §§) |sections |notes |- |v. |volume |vv. |volumes |notes |}

Conventions followed by publications and newspapers

United States

Publications based in the U.S. tend to follow the style guides of the Chicago Manual of Style and the Associated Press The U.S. Government follows a style guide published by the U.S. Government Printing Office

United Kingdom

Many British publications follow some of these guidelines in abbreviation: * For the sake of convenience, many British publications, including the BBC and [[The Guardian]] have completely done away with the use of full stops or periods in all abbreviations. These include: ** Social titles, like Ms or Mr (though these would usually not have had full stops — see above) Capt, Prof, etc.; ** Two-letter abbreviations for countries ("US" not "U.S."; ** Abbreviations beyond three letters (full caps for all except initialisms); ** Words seldom abbreviated with lower case letters ("PR" instead of "p.r." or "pr" ** Names ("FW de Klerk" "GB Whiteley" "Park JS". A notable exception is [[The Economist]]which writes "Mr F. W. de Klerk" ** Scientific units (see Measurement below). * Acronym are often referred to with only the first letter of the abbreviation capitalised. For instance, the North Atlantic Treaty Organisation can be abbreviated as "Nato"or "NATO" and Severe Acute Respiratory Syndrome as "Sars"or "SARS"(compare with "[[laser]]"which has made the full transition to an English word and is rarely capitalised at all). * Initialism are always written in capitals; for example the "British Broadcasting Corporation"is abbreviated to "BBC" never "Bbc" An initialism is similar to acronym but is not pronounced as a word. * When abbreviating scientific units, no space is added between the number and unit (100mph, 100m, 10cm, 10°C). (This is contrary to the SI standard, see below.)

Miscellaneous and general rules

* A doubled letter also appears in abbreviations of some Welsh names, as in Welsh language the double "l" is a separate sound: "Ll. George" for (British prime minister) David Lloyd George * Some titles, such as "Reverend" and "Honourable", are spelt out when preceded by "the", rather than as "Rev." or "Hon." respectively. This is true for most British publications, and some in the United States. * A repeatedly used abbreviation should be spelt out for identification on its first occurrence in a written or spoken passage. Abbreviations likely to be unfamiliar to many readers should be avoided. for example PO for post office

Measurement

The International System of Units (SI) defines a set of base units, from which other "derived" units may be obtained. The abbreviations, or more accurately "symbols" (using Roman letters, Greek letters in the case of ohm and micro and other characters in the case of degrees celsius for these units are also clearly defined together with a set of prefixes for which there are also abbreviations or symbols. There should never be a period after or inside a unit; both 10 k.m. and 10 k.m are wrong — the only correct form is 10 km (only followed with a period when at the end of a sentence). A period "within" a compound unit denotes multiplication of the base units on each side of it. Ideally, this period should be raised to the centre of the line, but often it is not. For instance, 5 ms means 5 millisecond(s), whereas 5 m.s means 5 metre·second(s). The "m.s" here is a compound unit formed from the product of two fundamental SI units — metre and second. However, the Interpunct symbol (·, unicode U+00B7, HTML ·) is the preferred way to represent compound units when available, e.g. "5 m·s". There should always be a Non-breaking space space between the number and the unit — 25 km is correct, and 25km is incorrect. In Section 5.3.3. of http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf The International System of Units (SI), the http://www.bipm.org/en/home/ International Bureau of Weights and Measures (BIPM)] states "The numerical value always precedes the unit, and a space is always used to separate the unit from the number. … The only exceptions to this rule are for the unit symbols for degree, minute, and second for plane angle."lt;/ref> The letter case (uppercase or lowercase) has meaning in the SI system, and case should never be changed in a misguided attempt to follow an abbreviation style. For example, "10 S" denotes 10 siemens (a unit of conductance), while "10 s" denotes 10 seconds. Any unit named after a person is denoted by a symbol with an upper case first letter (S, Pa, A, V, N, Wb, W), but spelt out in full in lower case, (siemens, pascal, ampere, volt, newton, weber and watt). By contrast g, l, m, s, cd, ha represent gram, litre, metre, second, candela and hectare respectively. The one slight exception to this rule is that the symbol for litre is allowed to be L to help avoid confusion with an upper case ior a 1 (number) in some typeface — compare l, I, and 1. Likewise, the abbreviations of the prefixes denoting powers of ten are case-sensitive: m (milli) represents a thousandth, but M (mega) represents a million, so by inadvertent changes of case one may introduce (in this example) an error of a factor of 1 000 000 000. When a unit is written in full, the whole unit is written in lowercase, including the prefix: millivolt for mV, nanometre for nm, gigacandela for Gcd. The above rules, if followed, ensure that the SI system is always unambiguous, so for instance mK denotes millikelvin, MK denotes megakelvin, K.m denotes kelvin.metre, and km denotes kilometre. Forms such as k.m and Km are ill-formed and technically meaningless in the SI system, although the intended meaning might be inferred from the context.

Syllabic abbreviation

A syllabic abbreviation is an abbreviation formed from (usually) initial syllable of several word , such as [[Interpol]] Inter national + police. It is basically a variant of the [[acronym]]. Syllabic abbreviations are usually written using [[lower case]], sometimes starting with a [[capital letter]], and are always pronounced as words rather than letter by letter. Syllabic abbreviations should be distinguished from [[portmanteau]]s. === Usage === ==== Different languages ==== Syllabic abbreviations are not widely used in [[English language|English]] or [[French language|French]]. The United States Navy, however, often uses syllabic abbreviations, as described below. On the other hand, they prevailed in Germany under the [[Nazi Germany|Nazis]] and in the Soviet Union for naming the plethora of new bureaucratic organizations. For example, Gestapo]] stands for Geheime Sta ts-Po izei, or "secret state police". Similarly, Comintern]] stands for the Communist International]]. This has caused syllabic abbreviations to have negative connotation, notwithstanding that such abbreviations were used in Germany even before the Nazis came to power, e.g., :de:Schupo|Schupo]] for chutzpolizei. Syllabic abbreviations were also typical for the [[German language]] used in the [[German Democratic Republic]], e.g. Stasi]] for taatssicherheit ("state security", the secret police) or opo for olkspolizist ("peoples policeman"). East [[Asia]]n languages whose writing uses [[Chinese language|Chinese]]-originated [[ideogram]]s instead of an alphabet form abbreviations similarly by using key [[Chinese character|characters]] from a term or phrase. For example, in [[Japanese language|Japanese]] the term for the [[United Nations]], kokusai rengō (国際連合) is often abbreviated to okuren (国連). (Such abbreviations are called [[:ja:略語|ryakugo]] (略語) in [[Japanese language|Japanese]]). The syllabic abbreviation is frequently used for universities: for instance, ěidà (北大) for ěijīng Dàxué (北京大学, [[Peking University]]) and ōdai (東大) for ōkyō daigaku (東京大学, [[University of Tokyo]]). ==== Organizations ==== {{See also|Neologism}} Syllabic abbreviations are preferred by the US [[Navy]] as it increases readability amidst the large number of [[initialism]]s that would otherwise have to fit into the same [[acronym]]s. Hence DESRON]] 6 is used (in the full capital form) to mean "Destroyer Squadron 6," while COMNAVAIRLANT]] would be "Commander, Naval Air Force (in the) Atlantic." == See also == * [[Acronym and initialism]] * [[List of abbreviations in use in 1911]] * [[Wiktionary:Wiktionary:Abbreviations in Webster|The abbreviations used in the 1913 edition of Websters dictionary]] * [[List of acronyms and initialisms]] * [[List of classical abbreviations]] * [[List of medieval abbreviations]] * [[List of abbreviations used in medical prescriptions]] == References == {{Reflist|2}} == External links == {{Wikisource1911Enc|Abbreviation}} * [http://www.abbreviations.com Abbreviations.com] — a database of acronyms and abbreviations * [http://www.acronymfinder.com Acronym Finder] — a database of acronyms and abbreviations (over 750,000 entries) * [http://www.all-acronyms.com All Acronyms] — a database of acronyms, initialisms and abbreviations (over 750,000 entries) * [http://acronymcreator.net AcronymCreator.net] - a language tool to make new meaningful acronyms and abbreviations [[Category:Abbreviations|*]] [[ar:اختصار]] [[az:Abbreviatura]] [[be:Абрэвіятура]] [[bg:Абревиатура]] [[ca:Abreviatura]] [[cs:Zkratka]] [[da:Forkortelse]] [[de:Abkürzung]] [[et:Lühend]] [[el:Συντομογραφία]] [[es:Abreviatura]] [[eo:Mallongigo]] [[fa:کوته‌نوشت]] [[fr:Abréviation]] [[gl:Abreviatura]] [[hi:सूचकाक्षर]] [[io:Abreviuro]] [[id:Abreviasi]] [[is:Skammstöfun]] [[it:Abbreviazione]] [[ht:Abreviyasyon]] [[la:Abbreviatio]] [[lb:Ofkierzung]] [[hu:Rövidítés]] [[ml:ചുരുക്കെഴുത്ത്]] [[mn:Товчлол]] [[nl:Afkorting]] [[ja:略語]] [[no:Forkortelse]] [[nn:Forkorting]] [[nds:Afkörten]] [[pl:Skrót]] [[pt:Abreviatura]] [[ro:Abreviere]] [[ru:Аббревиатура]] [[simple:Abbreviation]] [[sh:Kratica]] [[fi:Lyhenne]] [[sv:Förkortning]] [[tk:Abbrewiatura]] [[uk:Абревіатура]] [[yi:קורץ ווארט]] [[zh-yue:減筆]] [[zh:縮寫]]

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