Abbreviations-I

Abbreviations & Acronyms

Abbreviation:

An abbreviation is a shortened form of a word or a phrase (group of words).

The result of abbreviation is a reduced form or abridgement of writing. They are commonly used because they save time and space.

As said by John Horne Tooke, “Abbreviations are the wheels of language, the wings of Mercury.

Examples:

ATM = Automated Teller Machine

BBC =  British Broadcasting Corporation

Acronym:

It is a word formed from the initial letters of the several words in the name and pronounced as one word.

Examples:

NASA = National Aeronautics and Space Administration (USA)

AIDS = Acquired Immune Deficiency Syndrome.

Most Common Abbreviations & Acronyms with the Letter – I

I

I / i	Island or isle / International / Independence or independent / Institute / Italy (IVR = International Vehicle Registration) / (as a Roman number) 1 / Iodine (Chemistry) / Electric Current (symbol) / the imagery square root of -1 (mathematics)
IA / Ia	Institute of Actuaries / International Angstrom / Indian Airlines (now Air India-AI) / Iowa (US state)
IAA	Indole Acetic Acid
IAAF	International Association of Athletics Federations
IAEA	International Atomic Energy Agency
IAL	International Algebraic Language
IAF	Indian Air Force
IAP	Internet Access Provider (Computing)
IAS / i.a.s	Immigration Advisory Service / Indian Administrative Service / Immediate access store (Computing) / Instrument approach system
IATA	(abbreviation & acronym) International Air Transport Association
ib. / ibid.	Ibidem (Latin) = in the same place or source
IB	International Baccalaureate
IBA	Independent Broadcasting Authority (UK)
IBAN	International Bank Account Number
IBF	International Boxing Federation

I.Biol.	Institute of Biology (UK)
IBM	International Business Machines (leading US computer manufacturer)
IBRD	International Bank for Reconstruction and Development (the World Bank)
IBS	Irritable bowel syndrome
i/c	In charge / in command
IC	Integrated Circuit (Electronics) / internal-combustion
ICA	Institute of Chartered Accountants /
ICAEW	Institute of Chartered Accountants of England and Wales
ICAI	Institute of Chartered Accountants of Ireland
ICANN	Internet Corporation for Assigned Names and Numbers
ICAO	International Civil Aviation Organization
ICBM	International Ballistic Missile
ICC	International Cricket Council / International Chamber of Commerce / International Criminal Court
ICD	International Classification of Diseases / Interactive compact disc (Computing)

ICE	Institute of Civil Engineers / Internal combustion Engine / Intrusion countermeasure electronics (anti-hack software)
ICFTU	International Confederation of Free Trade Unions
I.Chem.E. / IChemE	Institution of Chemical Engineers
ICI	Imperial Chemical Industries (Limited)
ICR	Intelligent character recognition
ICRC	International Committee of the Red Cross
ICRF	Imperial Cancer Research Fund (now called Cancer Research (UK))
ICSA	Institute of Chartered Secretaries and Administrators
ICSH	Interstitial-cell-stimulating hormone
ICSI	Intracytoplasmic sperm injection (in vitro fertilization)
ICSID	International Center for Settlement of Investment Disputes
ICSTIS	(acronym) independent Committee for the Supervision of Standards for Telephone Information Services
ICSU	International Council of Scientific Unions (now known as International Council for Science)
ICT	Information and communication technology
ICU	Intensive Care Unit
id.	Idem (Latin) = the same

ID	Identification / Identity / Intelligence Department / Information Department / Idaho (US state) / Inner Diameter (also i.d.) / Intradermal (also i.d.) (Medicine) / infectious diseases (Medicine)
Ida.	Idaho (US state)
IDA	International Development Association
IDB	Illicit diamond buying (esp. South Africa)
IDD	International Direct Dialing (Telecommunications)
IDE	Integrated Development Environment (software-user interface) / Integrated Drive Electronics (device control system in computer)
i.e.	id est (Latin) = that is / that is to say
IDF	Israel Defence Forces
IDK	I don’t know (informal)
IDN	In Dei nomine (Latin) = in the name of God
IDP	Integrated Data Processing (Computing) / Internally displaced person (a person forced to move from his place)
IE	Indo-European

IEA	International Energy Agency
IEC	International Electrochemical Commission
IED	Improvised explosive device
IEE	Institution of Electrical Engineers (UK)
IEEE	Institute of Electrical and Electronics Engineers
IEGMP	Independent Expert Group on Mobile Phones
IF	Intermediate Frequency
IFA	Independent Financial Advisor
IFAD / Ifad	(Abbreviation & acronym) international Fund for Agricultural Development
IFC	International Finance Corporation
IFP	Inkatha Freedom Party (in South Africa)
IFPI	International Federation of the Phonographic Industry

IFR	Instrument flight rules / Instrument flying regulations (or rules) (aeronautics)
IFS	Institute for Fiscal Studies / Irish Free State (historical)
IG	Indo-Germanic / Inspector General (in some countries like India)
Ig	Immunoglobulin (Biochemistry)
IGC	Intergovernmental conference (esp. in the European Union)
IGCSE	International General Certificate of Secondary Education
ign.	Ignotus (Latin) = unknown
IGNOU	(both abbreviation & acronym) — Indira Gandhi National Open University (in India)
IHC / IHS	Iesous (Greek) = Jesus (used symbolic and in manuscripts)
IHT	Inheritance Tax (UK)
IIP	Office of the International Information Programs (in the USA) [(USIA = United States Information Agency (formerly)]
IIS	Institute of Information Scientists (now replaced by CILIP)

IIT	Indian Institute of Technology
IKBS	Intelligent knowledge-based system (Computing)
IL	Illinois (US state) / Israel (IVR=International Vehicle Registration)
ILEA	Inner London Education Authority
ILO	International Labour Organization (UNO body)
ILS	Instrument Landing System
IM	Institute of Management (now known as CMI) / Intramuscular(ly) (also i.m.) / Instant Messaging
IMA	Investment Management Association
IMAP	Internet Mail Access Protocol (Computing) / Internet Message Access Protocol
I.Mar.E / IMarE	Institute of Marine Engineers
IMarEST	Institute of Marine Engineering, Science and Technology (IMarE)
IMAX®	Image (Eye=i) Maximum (A system of widescreen presentation) (Trademark)
IMechE	Institution of Mechanical Engineers

IMEI	International Mobile Equipment Identity (Mobile identification number)
IMF	International Monetary Fund
IMHO/imho	In my humble opinion
I.Min.E / IMinE	Institution of Mining Engineers
IMM	Institution of Mining and Metallurgy
IMO / imo	International Maritime Organization / in my opinion (imo) / International Miners’ Organization
Imp.	Imperator (Latin) = Emperor / Imperatrix (Latin) = Empress / Imperial
IMP	International Match Point (Bridge)
I.Mun.E / IMunE	Institution of Municipal Engineers (UK)
IN	Indiana (US state)
in.	Inches
In	Ndium (Chemistry-symbol)

INA	Indian National Army
Inc. / inc.	Incorporated ( accompany consulted as a legal corporation) / Including / inclusive
incl. / inc.	Including / inclusive
IND	India (IVR = international Vehicle Registration) In Nomine Dei (Latin) = in the name of God
Ind.	Indiana (US state) / India / Indian / Independent
INF	Intermediate-range nuclear forces
inf.	Information / infantry / infra (Latin) = below / Infinitive / inferior / informal
INLA	(acronym) Irish National Liberation Army
in loc.	In loco (Latin) = in its place
in loc. cit.	In coco citato (Latin) = in the place cited
INMARSAT / Inmarsat	International Maritime Satellite
INRI	(acronym) Iesus Nazarenus Rex (Latin) = Jesus of Nazareth, King of the Jews
INS	Immigration and Naturalization Service (US) / International News Service / Inertial navigation system

ins.	Inches (also in) Insurance
INSET	(acronym) In-service education and training (for schoolteachers)
insp.	Inspector (as a police rank)
inst.	Instant, ie the present month (used in formal correspondence)
Inst.	Institute / Institution
Inst.P.	Institute of Physics (UK)
INSTRAW	International Research and Training Institute for the Advancement of Women (United Nations Agency)
int.	International / interest / internal / interior
Int.	International
int	Integer (Computing)
INTERPOL	(acronym) — International Criminal Police Commission
inv.	Invenit (Latin) = designed it / Invoice / invented
I/O	Input/output (Electronics & Computing)
IOC	International Olympic Committee

IoJ	Institute of Journalists (Now known as CIoJ = Chartered institute of Journalists)
IOLT	Institute of Logistics and Transport
IOM	Isle of Man
IOP	Institute of Physics
IOU	I Owe You (signed debt acknowledgement)
IOW	Isle of Wight / in other words (informal)
IP	Internet Protocol (Computing)
IPA	India Pale Ale / Institute of Practitioners in Advertising / International Phonetic Alphabet / International Phonetic Association / International Publishers’ Association
IPC	International Publishing Corporation
IPCC	Intergovernmental Panel on Climate Change
IPD	Institute of Personnel and Development (now Known as CIPD = Chartered Institute of Personnel and development)
iPhone®	(Acronym) a brand of smart phone

IPMS	Institution of Professionals, Managers and Specialists (now known as Prospect (acronym))
IPO	Initial Public Offering (Stock Exchange) (chiefly in US)
iPod®	A brand of digital audio/video player (Trademark)
IPPF	International Planned Parenthood Federation
IPR	Intellectual Property Rights
iq	Idem quod (Latin) the same as
IPS	Indian Police Service
IQ	Intelligence Quotient
ir	Infrared
IR	Inland Revenue / Iran (IVR=International Vehicle Registration)
Ir	Iridium (symbol) Chemistry
Ir.	Ireland / Irish

IRA	Irish Republic Army / Individual Retirement Account (US)
IRB	International Rugby Board
IRBM	Intermediate-Range Ballistic Missile
IRC	Internet Relay Chat (Computing)
IRL	Ireland (IVR = International Vehicle Registration)
IRO	Inland Revenue Office / International Refugee Organization
IRQ	Iraq (IVR = International Vehicle Registration)
irreg.	Irregular / Irregularly
IRS	Internal Revenue Service (US)
IS	Iceland (IVR = International Vehicle Registration) / Income support / information science (or systems) / Internal security / independent suspension (Mechanics)
Is.	(the Book of) Isaiah (Bible) / Island(s) or Isle(s)
ISA	Individual Savings Account (UK) (Finance) / Industry Standard Architecture (a bus system of earlier computers)

Isa.	(the Book of) Isaiah
ISBA	Incorporated Society of British Advertisers
ISBN	International Standard Book Number (SBN (formerly) = Standard Book Number)
ISC / ISCIS	Independent Schools Council / Independent Schools Council Information Service)
ISD	International Subscriber Dialing
ISDN	Integrated services digital network (Telecommunications)
ISI	Indian Standards Institution / Inter-Services Intelligence (Pakistan)
ISIS	(abbreviation & acronym) Independent Schools Information Service (now known as ISCIS)
IsI.	Island
ISM	Institute for Supply Management (US) (formerly NAPM)
ISO	(Companion of the) Imperial Service Order / International Organization for Standardization
ISP	Internet Service Provider

ISS	International Space Station / International Social Service
ISSN	International Standard Serial Number
ISSP	Intensive Supervision and Surveillance Programme (for young offenders)
ISRO	(acronym) —Indian Space Research Organization
IST	Indian Standard Time
ISTC	Iron and Steel Traders Confederation (formerly)
ISV	Independent software vendor
IT	Information Technology
It.	Italian / Italian vermouth
ITA	Independent Television Authority / Initial teaching alphabet
ital.	Italic / Italian / Italy
ITI	Industrial Training Institute (India)

ITO	Income Tax Officer / International Trade Organization
ITU	Intensive therapy unit (Medicine) / International Telecommunication Union
ITV	Independent Television (UK)
iTV	Interactive television
IU	International Unit / Intrauterine (also i.u.)
IUCD	Intrauterine contraceptive device (IUD)
IUCN	International Union for the Conservation of Nature
IUD	Intrauterine (contraceptive) device / Intrauterine death (of a fetus)
IUPAC	(Acronym) international Union of Pure and Applied Chemistry
IUPAP	(Acronym) international Union of Pure and Applied Physics
IV	Intravenous / intravenously / intravenous drip
IVA	Individual voluntary agreement

IVD	Intra vas device (a contraceptive)
IVF	In vitro fertilization
IVR	International Vehicle Registration
IW	Isle of Wight
IWC	International Whaling Commission
IWW	Industrial Workers of the World

Abbreviations & Acronyms in Alphabetical Order – Click the Letter

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

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