I

I

(Chem.) Iodine, (Mech.)moment of inertia

i

(light) intensity of light, luminous intensity

I&W

Indications and Warnings

I.

island, isle, inclination, intensity, moment of inertia

I. A. S.

(Aero.) indicated air speed

I. C. A. O.

International Civil Aviation Organization

I. C. B. M.

Inter-continental ballistic missile

I. C. W.

(Radio.)interrupted continuous waves

I. D.

(Eng.) internal (inside) diameter

I. D. F.

(Teleph.) intermediate distribution frame

I. F. R.

(Aero.) instrument flight rules

I. L. S.

(Aero.) instrument landing system

I. M. F.

International Monetary Fund

I. M.E. P.

(Eng.)indicated mean effective pressure

I. P.

Initial pressure

i. p. m.

inches per minute

i. p. s.

inches per second

i. q.

 the same as

I. U.

international unit(s)

I. W.

(Phys.) isotopic weight

I.B.

incendiary bomb

I.C.A.

International cooperation Administration, International Cooperative Alliance

I.C.C.

Interstate Commerce Commission, International Chamber of Commerce

I.C.J.

International Court of Justice

i.e.

 that is

I.F.S.

Irish Free State

I.G.

Indo Germanic, Inspector General

I.G.Y.

International Geophysical Year

I.L.O.

International Labor Organization

I.N.R.I.

 Jesus of Nazareth, king of the Jews

i.p.

(Mech.) intermediate pressre

I.S.V.

International Scientific Vocabulary

I.T.O.

International Trade Organization

I.W.W.

Industrial Workers of the World

I/F

Insufficient funds

I/O

input/output

IA

Irrespirable Atmosphere

Ia.

Iowa

IAADF

Iraqi Air and Air Defense Forces

IADB

Inter-American Development Bank

IADF

Iraqi Air Defense Forces

IADS

Integrated Air Defense System

IAEA

International Atomic Energy Agency

IAEC

International Atomic Energy Commission

IAF

Italian Air Force

IAS

Indicated airspeed, ASIR corrected for instrument error.

IATA

International Air Transport Association.

IATA

International Air Transport Association

iaw

in accordance with

ib. or ibid.

ibidem

IBDS

Integrated Biological Detection System

IBEC

International Bank for Economic Cooperation

IBRD

International Bank for Reconstruction and Development

IC

integrated circuit

ICAD

Individual Chemical Agent Detector

ICAM

Improved Chemical Agent Monitor

ICAM-D

Improved Chemical Agent Monitor - Detector

ICAO

International Civil Aviation Organization

ICAO

International Commercial Aviation Organization

ICBM

intercontinental ballistic missile

ICC

information co-ordination control

ICC

International Chamber of Commerce

ICEM

Intergovernmental Committee for European Migration

ICFTU

International Confederation of Free Trade Unions

ICJ

International Court of Justice

ICM

Intergovernmental Committee for Migration

ICMS

integrated countermeasures system

ICNIA

integrated communications, navigation and identification avionics

ICRC

International Committee of the Red Cross

ICRM

International Red Cross and Red Crescent Movement

ICS

Integrated Communications System

ICV

infantry combat vehicle

ICWAR

improved continuous wave acquisition radar

id.

 same

IDA

Improved dogbone assembly

IDA

International Development Association

IDB

Islamic Development Bank

IDF

Israel Defense Forces

IDU

Ionization (Ionization) Detector Unit

IEA

International Energy Agency

IEMATS

Improved Emergency Message Automation Transmission System

IF

intermediate frequency

IFAD

International Fund for Agricultural Development

IFC

International Finance Corporation

IFCS

improved (integrated) fire control system

IFCTU

International Federation of Christian Trade Unions

IFF

Identification Friend or Foe

IFM

instantaneous frequency measurement

IFP

ISO Compatible Palletized Flatrack

IFR

Instrument Flight Reference

IFR

Instrument flight rules (compare VFR) also in-flight refueling.

IFRCS

International Federation of Red Cross and Red Crescent Societies

IFV

Infantry Fighting Vehicle

IGAD

Inter-Governmental Authority on Development

IGADD

Inter-Governmental Authority on Drought and Development

IGE

instrumentation graphics environment

IHE

improved high explosive

IHEWS

integrated helicopter electronic warfare suite

IHO

International Hydrographic Organization

IHS,

 Jesus, Savior of Men

II

Image Intensifier or Intensifying. An electro-optical sight incorporating electronic amplification of ambient light to present an enhanced view of the target area. Completely passive and undetectable, though some early units emitted a high-pitched noise which alarmed animals.

IIB

International Investment Bank

IIR

Intelligence Information Report or Imaging Infrared

IKAT

interactive keyboard and terminal

Il

(Chem.) illinium

ill.

illustrated, illustration

Ill.

Illinois

illus.

illustrated, illustration

ILM

Intermediate-Level Maintenance

ILMC

Intermediate-Level Maintenance Center

ILO

International Labor Organization

ILS

integrated logistic support or instrument landing system (VHF-band aircraft landing aid)

IMA

Individual Mobilization Augmentee

IMC

Instrument meteorological conditions

IMCO

Intergovernmental Maritime Consultative Organization

IMET

International Military Education and Training

IMF

Improved mine fuse

IMF

International Monetary Fund

IMINT

Imagery intelligence

imit.

imitation, imitative

IMK

Increased maneuverability kit.

IMMLC

Improved medium mobility load class

IMO

International Maritime Organization

Imp

improved

imp.

imperative, imperfect, imperial, import,

imported, importer, imprimatur

Imp.

 Emperor, Empress

imper.

imperative

imperf.

imperfect

Imperial gallon

1.20095 US gallons 4.546 liters.

IMQT

Initial Mission Qualification Training

IMS

Integrated multiplex system.

IMU

inertial measurement unit

in

inch

In,

(Chem.) indium

in.

inch(s)

INAS

Integrated nav/attack system.

inc.

in closure, included, including, inclusive

incorporated, increase

INCA

Integrated Nuclear Communications Assessment

Incl

includes/including

incl.

in closure, including, inclusive

incog.

incognita, incognito

Incr.

increase, increased, increasing

IND

Investigational New Drug

ind.

independent, index, indicative, industrial, industry.

Ind.

India, Indian, Indiana

indef.

indefinite

Indep

independent

indic.

indicating, indicative

Indirect fire

Fire in which the weapon and the target are not within sight of each other.

individ.

individual

indus.

industrial, industry

INEWS

integrated electronic warfare system

inf

infantry

INF

intermediate range nuclear forces (treaty)

inf.

infinitive, information

infin.

infinitive

infl.

influenced

init.

initial

INMARSAT

International Maritime Satellite Organization

Inmarsat

International Mobile Satellite Organization

InOC

Indian Ocean Commission

inorg.

inorganic

INS

Inertial navigation system

ins.

inspector, insulated, insurance

insol.

insoluble

insp.

inspector

inst.

instant, institute, institution, institutional, instrumental

instr.

instructor, instrument, instrumental

INSTRAW

Iternational Research and Training Institute for the Advncement of Women

int.

interest, interior, interjection, internal,

international, interpreter, intransitive

INTACS

Integrated Tactical Communications Study

INTELSAT

International Telecommunications Satellite Organization

intens.

intensive

intercom

Wired telephone system for communication within aircraft.

interj.

interjection

internat.

international

INTERPOL

International Criminal Police Organization

interrog.

interrogative, interrogation

Intersputnik

International Organization of Space Communications

intl.

international

intr. or intrans.

intransitive

intro.

Introd., Introduction, introductory

inv.

invented, inventor, invoice

Io,

(Chem.) ionium

IOC

initial operating capability

IOC

Intercept Operations Center or Integrated Operations Center

IOC

International Olympic Committee

IOD

Improvised ordnance disposal

IOM

International Organization for Migration

IONDS

integrated operational nuclear detection system

IOS

integrated observation system

IOT&E

Initial Operational Test and Evaluation

IOTE

Initial Operational Test and Evaluation

IOU

I owe you

IP

Initial Point

IP

intellectual property, or initial production

IPA

International Phonetic Alphabet

IPC, IPT

Intermediate-pressure compressor, turbine.

IPD

improved point defense

IPDS

Inland Petroleum Distribution System

IPE

Individual Protection Ensemble

IPR

intellectual property rights

ips

instructions per second

IQ. or I.Q.

Intelligence quotient

IR

Infra-Red

Ir

(Chem.) iridium

IR&D

Internal research and development

Ir.

Ireland, Irish

IRAF

Iraqi Air Force

IRAN

Inspect and repair as necessary.

IRBM

intermediate range ballistic missile

IRCM

infra-red countermeasures

Ire.

Ireland

IRLS

Infra-red linescan

IRR

Individual Ready Reserve

IRR

Integrated Radio Room

irreg.

irregular, irregularly

IRS

Inertial reference system.

IRST

Infra-Red Search and Track

IRV

Improved recovery vehicle

IS

Internal Security. Generally describes the use of troops to aid the civil power.

is. or isl.

island, isle

ISA

International Standard Atmosphere.

ISAR

inverse synthetic aperture radar

ISB

independent sideband

ISC

Infantry section carrier

ISD

in-service date

ISDN

integrated services digital network

ISIS

Integral spar inspection system.

ISLS

interrogator sidelobe suppression

isls.

Islands

ISO

International Standardization Organization

ISW

Integrated Strike Warfare

IT

information technology

It. or Ital.

Italian, Italy

ITAC

Intelligence and Threat Analysis Center

ITF

Intelligence Task Force

ITP

intent to purchase

ITSS

integrated tactical surveillance system

ITT

invitation to tender

ITU

International Telecommunication Union

IUS

inertial upper stage

IUSS

integrated undersea surveillance system

IV.

intravenous, intravenously

IVCS

Integrated Vehicle Communications System

IVD

interactive video disk

IVDN

integrated voice and data network

IVDU

intelligent visual display unit

IVECO

Industrial Vehicle Corporation

IVSI

Instantaneous VSI.

IVSN

Initial Voice Switched Network

lt

light