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)
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)