Alphabetical Index of Abbreviations ~ I

Click on the appropriate first letter of the abbreviation that you require

IAASP	International Association of Airports and Seaports
IACS	International Association of Classification Societies
IAEA	International Atomic Energy Agency
IAIN	International Association of Institutes of Navigation
IAL	Instrument approach and landing
IALA	International Association of Lighthouse Authorities
IAOPA	International Aircraft Owners and Pilots Association
IAP	Instrument approach procedures
	Internet access provider
IAPH	International Association of Ports and Harbours
IAS	Indicated air speed
IASA	International Aviation Safety Assessment (FAA)
IATA	International Air Transport Association
IBC	International bulk carrier
IBDS	Integrated biological detection system
ibid	Ibidem (in the same place)
IBN	Identification beacon
IBRD	International Bank for Reconstruction and Development
IBS	Integrated bridge system (ship)
IC	In charge
	Integrated circuit
	Internal combustion
ICA	International commodity agreement
ICAO	International Civil Aviation Organisation
ICAPS	Integrated command anti-submarine warfare prediction system
ICB	International Container Bureau
	International competitive bidding
ICBM	Intercontinental ballistic missile
ICC	International Chamber of Commerce
ICE	Dry ice (hazardous cargo label)
ICES	International Council for the Exploitation of the Sea
ICHCA	International Cargo Handling Co-ordination Association
ICLL	International Convention on Load Lines
ICM	Improved conventional munitions
ICNIA	Improved communications, navigation, identification avionics
	Integrated communications, navigation, identification avionics
ICOTAS	International Committee on the Organisation of Traffic at Sea
ICP	Inventory control point
ICS	International Chamber of Shipping
ICT	International call for tenders
ICV	Infantry combat vehicle
ID	Identification
	Import duty
IDAS	Integrated defence aid system
IDC	Insulation displacement connector
	International digital communications
IDE	Integrated drive electronics
IDF	Interceptor day fighter
IDS	Intruder detection system
IE	Index error (nav)
ie	id est (that is to say)
IEC	International Electrotechnical Commission
IED	Improvised explosive device
IEDD	Improvised explosive device disposal
IEE	Institution of Electrical Engineers
IERE	Institution of Electronic & Radio Engineers
IERS	International earth rotation service
IETM	Integrated electronic technical manuals
IETP	Integrated electronic technical publication
IF	Intermediate frequency
IFA	International Federation of Airworthiness
IFALPA	International Federation of Airline Pilots Association
IFATCA	International Federation of Air Traffic Controllers Association
IFB	Invitation for bid
IFC	International Finance Corporation
IFCS	Improved fire control system
IFF	Identification, friend-or-foe
IFGET	Insulated gate field effect transistor
IFL	International frequency list
IFM	Instantaneous frequency measurement
IFO	Intermediate fuel oil
IFR	Instrument flight rules
IFRB	International Frequency Registration Board
IFV	Infantry fighting vehicle
IFZ	Inshore fisheries zone
IGBT	Inverse gate bipolar transistor
IGC	Internation gas carrier
IGES	Initial graphics exchange specification (computer)
IGFET	Insulated gate field effect transistor
IGOS	Integrated global observing system (of CEOS)
IGOSS	Integrated Global Ocean Service System
IGS	Inert gas system
IHADSS	Integrated helmet and display sight system
IHO	International Hydrographic Organisation
II	Image intensifier
IIOS	International ice observation service
IIP	International ice patrol
IIT	Image intensifier tube
IKBS	Intelligent knowledge-based system (computer)
ILGS	Instrument landing guidance system
ILS	Instrument landing system (aircraft)
	Integrated logistic support
ILSM	Integrated logistic support manager
ILSN	Integrated logistic support number
ILSP	Integrated logistic support plan
IM	Inner marker
	Instant messaging (telephone)
	Interceptor missile
IMC	Instrument meteorological conditions
IMCO	Intergovernmental maritime consultative organisation
IMDEX	International marine traffic data exchange
IMDG	International maritime dangerous goods (code)
IMF	International Monetary Fund
IMIF	International Maritime Industry Forum
IMM	Integrated materials management
IMMLC	Improved medium-mobility load carrier (truck)
IMO	International Maritime Organization
IMP	Initial military programme
	Internal message procedure
IMS	Ion mobility spectrometry
in	Inch (0.025 m)
IN	Inertial navigation
INAS	Inertial navigation and attack system
inf	Infantry
INF	Intermediate-range nuclear forces
Inmarsat	International Maritime Satellite Organisation
INS	Inertial navigation system
int	Intelligence
	Intersection
intl	International
intsum	Intelligence summary
IO	Intelligence officer
IOC	Initial operator capability
	Intergovernmental Oceanographic Commission
IOCS	Input/output control system (computer)
IODE	International Ocean Data and Information Exchange
IOT	Input/output terminal
IOTTSG	International Oil Tanker and Terminal Safety Group
IOU	I owe you
IP	Initial point
	Initial provisioning
	Internet protocol
IPAR	Improved pulse acquisition radar
IPARS	International passenger reservation system
IPC	Illustrated parts catalogue
IPCC	Intergovernmental panel of climate change (UN)
IPL	Initial provisioning list
IPP	Internet printing protocol
IPR	Intellectual property rights
IPSS	Initial provisioning support system
IPT	Integrated project team
IPV	Inshore patrol vessel
IR	Infra-red
IRBM	Intermediate range ballistic missile
IRCM	Infra-red counter-measures
IRFC	Infra-red false colour
IRLS	Infra-red linescan system
IRM	Inspection, repair and maintenance
IRS	Initial readiness site
	Internal radar service
IRVR	Instrumented runway visual range
IS	Internal security
ISA	Industry standard architecture (computers)
	International standard atmosphere (101 325 Pa or 760 mm Hg)
ISD	In-service date
ISDN	Integrated services digital network
ISF	International Shipping Federation
ISGOTT	International safety guide for oil tankers and terminals
ISIC	International standard industrial classification
ISID	International ship identification database
ISIS	Integrated ship instrumentation system
	Integrated strike and interceptor system
	Item of supply information system
ISM	International safety management (code)
ISMO	Information system management office
ISO	Infra-red space observatory
	International Standards Organisation
ISO14000	Environmental management standard certified by ISO
ISO17799	Security standard certified by ISO
ISO9000	Quality standard certified by ISO
ISP	Integrated support plan
	Internet service provider
ISSP	Integrated supply support procedures
ISTAR	Intelligence, surveillance, target acquisition and reconnaissance
ITA	International telegraph alphabet
ITEA	Integrated test, evaluation and acceptance
ITER	International Thermonuclear Experimental Reactor
ITIC	International tsunami information centre
ITP	Intercept terminal point (nav)
ITSEC	Information technology security evaluation and certification scheme
ITT	Invitation to tender
ITU	International Telecommunications Union (formerly CCITT)
ITZ	Inshore traffic zone
IUKADGE	Improved UK air defence ground environment
IVSN	Initial voice-switched network
IW	Individual weapon
	Inland waters
IWS	Interoperable waveform standard (communications)
IWT	Inland waterways transport
	International Water Tribunal