- I -

i Inclination
I2 Intelligence Information
IA (1) Imagery Analyst; (2) Intelligence Assistant; (3) Initial Assessment; (4) Intelligence Analyst; (5) Intelligence Agent
IAA Interagency Agreement
I&A (1) Imagery and Analysis; (2) Identifcation and Authentication
IAB Imagery Analysis Branch
IAC (1) Intelligence Analysis Center; (2) Intelligence Advisory Committee; (3) Intelligence Analyst Course (DIA); (4) Information Analysis Centers
IAD (1) Intelligence Analysis Division; (2) Integrated Air Defense
IADB Inter-American Defense Board
IADS Integrated Air Defense System
IAEA International Atomic Energy Agency
IAG (1) Intelligence Analysis Group (formerly ITAD); (2) Imagery Analysis Group
IAGC Instantaneous Automatic Gain Control
IAGS Inter-American Geodetic Survey
IAIPS Integrated Automated Intelligence Processing System
IAM Imagery Analysis Memorandum
IAMP Imagery Acquisition and Management Plan
IAMS Individual Aerial Mobility System
IAN Imagery Analysis Notice
IAP International Airport
IAPF Inter-American Peace Force
IAR Imagery Analysis Report
IAS (1) Intelligence Access System; (2) Interactive Applications System; (3) Intelligence Analysis System
IAS WS IAS Work Station
IASSA INSCOM Automated Systems Support Activity
IAT Intelligence Augmentation Team
IATA International Air Transport Association
IAW In Accordance With
IAWG Interagency Working Group
IAWS Improved Analyst Workstation
IBAC Identity-Based Access Control
IBs Issue Books
IBBS Interim Brigade/Battalion Simulation
IBD Intelligence Baseline Document
IBDTF IBD Transaction Format
IBE Field-Initiated BE Number
IBERLANT Iberian Atlantic Area
IBIS Imaging Background Limited Infrared System
IBM International Business Machines
IBO Intelligence Baseline Overview
IBOS Intelligence Battlefield Operating System
IBS (1) Interactive Beacon System; (2) Integrable Base Station; (3) Integrated Broadcast Service; (4) Intelsat Business Service; (5) Integrated Bridge System
IBSSIR Background Signature Survey
IBTA Integrated Battlefield Targeting Architecture
IBUR Intelligence Bottom-Up Review
IC (1) Intelligence Community; (2) Intelligence Collection; (3) Integrated Circuit; (4) Intelligence Center; (5) Irish Concern
IC/EC Intelligence Community/Executive Committee
ICA Intelligence Center Atlantic
ICAF Industrial College of the Armed Forces
ICAO International Civil Aviation Organization
ICAP Improved Capabilities Program
ICARIS Intelligence Communications Architecture and Requirements Information System
ICBM Intercontinental Ballistic Missile
ICC (1) Integrated Communications Center; (2) Intelligence Continuity Cell; (3) IMlNT Coordination Cell; (4) Intelligence Coordination Center (Coast Guard); (5) Initial Connectivity Capability
ICCC International Council for Computer Communication
ICD (1) Interface Control Document; (2) Intelligence Collection Division; (3) Initiative Communications Deception
ICDP Intelligence Career Development Program
ICE (1) Independent Cost Estimate; (2) Interface Control Element
ICEDEFOR Iceland Defense Forces
ICES International Cooperation in Ocean Exploration
ICF (1) Intelligence Collection Flight; (2) Intelligence Contingency Funds; (3) Interconnect Facility
ICFTU International Confederation of Free Trade Unions
ICIG IDHSS CSSR Interface Guard
ICITAP International Criminal Investigative Training and Assistance Program
ICL Intelligence Coordination Cell
ICM (1) Improved Conventional Munitions; (2) Intelligence Correlation Module; (3) Integrated Common Modules
ICMC Intelligence Collection Management Course
ICOD Intelligence/Information Cut-Off Date
ICOM Integrated COMSEC (SINCGARS)
ICON Image Communications and Operations Node
ICP (1) Intelligence Collection Platform; (2) Interface Change Proposals; (3) Incremental Change Packages
ICPS Intelligence Communications Processing Shelter
ICR Intelligence Collection Requirement
ICRC (1) Intelligence Contingency Readiness Center; (2) International Committee of the Red Cross
ICRS Imagery Collection Requirements Subcommittee (COMIREX)
ICS (1) Intercommunications System; (2) Intelligence Community Staff
ICTF Interagency Crisis Task Force
ICTT (1) Improved Commander’s Tactical Terminal; (2) Interim Commander’s Tactical Terminal
ICU Interface Control Unit
ICV Infantry Combat Vehicle
ICW In Coordination With
ICWG (1) Interface Control Working Group; (2) Imagery Coordination Working Group
ID (1) Identification; (2) Infantry Division; (3) Intelligence Division
IDA Institute for Defense Analysis
IDAD Internal Defense and Development
IDB (1) Integrated Data Base; (2) Inter-American Development Bank
IDB-II PC-Based Integrated Data Base
IDBM Integrated Data Base Maintenance
IDBR Integrated Data Base Retrieval
IDBTF Intelligence Data Base Transaction Format
IDC Interagency Defector Committee
IDCSP Initial Defense Communications Satellite Program
IDEAS Intelligence Data Element Authorization Standards
IDES Installation Damage Expectancy Summary
IDEX Imagery Data Exploitation System
IDEX II Imagery Data Exploitation System II
IDF (1) Israeli Defense Force; (2) Installation Data File
IDHS Intelligence Data Handling System
IDHS IDHS for the mid-1990s
IDHS-2000 Intelligence Data Handling System for the Year 2000
IDHS-II Intelligence Data Handling System, Second Iteration
IDHSC Intelligence Data Handling System Communications
IDHSC-II Intelligence Data Handling System Communications, Version II
IDIMS Interactive Digital Image Manipulation System
IDIQ Indefinite Delivery, Indefinite Quantity
IDIRA Introduction to Defense Intelligence Research and Analysis (DIA)
IDL Interoperable Data Link
IDM Improved Data Modem
IDMS IPAC Document Management System
IDN Integrated Data Network
IDNX Integrated Digital Network Exchange
IDP Intelligence Data Processor
IDPS (1) Imagery Data Processing System; (2) Integrated Deployable Processing System; (3) Interim Deployable Processing System
IDS (1) Intrusion Detection System; (2) Infrared Detection Set
IDSCS Initial Defense Satellite Communications System
IDSCP Initial Defense Satellite Communication Program
IDSF Intelligence Defector Source File
IDTT Inactive Duty Training Travel
IDZ Inner Defense Zone
IEA International Energy Agreement
IEBL Inter-Entity Boundary Line
IEC (1) Imagery Exploitation Center; (2) Intelligence Exchange Conference
IED (1) Improvised Explosive Device; (2) Imitative Electronic Deception
IEG Imagery Exploitation Group
IEMATS Improved Emergency Message Automated Transmission System
IEP Independent Evaluation Plan
IEPG Independent European Program Group
IEPR Information Exchange and Processing Requirements Report
IER Independent Evaluation Report
IES Imagery Exploitation System
IESS Imagery Exploitation Support Segment
IEW Intelligence and Electronic Warfare
IEWCS IEW Common Sensor
IEWD Intelligence and Electronic Warfare Directorate
IEWFAM IEW Functional Area Model
IEWSE IEW Support Element
IEWTAC IEW Technology Assessment Center
IEWTPT IEW Tactical Proficiency Trainer
IF (1) Interrogation Facility; (2) Identification Frequency; (3) Intermediate Frequency
IFAC International Federation of Automatic Control
IFF Identification, Friend or Foe
IFFN Identification, Friend, Foe or Neutral
IFOR Implementation Force (Operation JOINT ENDEAVOR)
IFOV Instantaneous Field-of-View
IFPS Interformation Position System
IFR Instrument Flight Rules
IFRB International Frequency Registration Board
IFS Imagery File Server
IFTE Integrated Family Test Equipment
IFV Infantry Fighting Vehicle
IG (1) Interagency Group; (2) Inspector General; (3) Intelligence Group (Air Force)
IGCP Intelligence Guidance for COMINT Programming
IGD Intelligence Guidance Document
IGR Improved GUARDRAIL
IGRV Improved GUARDRAlL V
IGS Image Generation System
IGSM Interim Ground Station Module
IGT Interdepartmental Group on Terrorism
IGY International Geophysical Year
IHC Intelligence Information Handling Committee
IHE Insensitive High Explosive
IHFR Improved High Frequency Radio
IHO (1) International Hydrographic Organization; (2) In Honor of
IHR In-Extremis Hostage Rescue
II (1) Imagery Interpretation; (2) Imagery Interpreter
IIC Imagery Interpretation Center
IICT Interagency Intelligence Committee on Terrorism
IID Integrated Information Display
IIDP Integrated Intelligence Development Plan (USCINCEUR)
IIE Installation Identification Element
IIF Imagery Interpretation Facility
IIG (1) Imagery Intelligence Group (formerly USAlIC); (2) Intelligence Inspector General
IIM Interagency Intelligence Memorandum
IIN Imagery Interpretation Note
IINCOMNET Intratheater Intelligence Community Network
IINS Imagery Information Need Statement
IIPL Integrated Intelligence Priority List
IIR (1) Imaging Infrared; (2) Intelligence Information Report; (3) Imagery Interpretation Report
IIRES Imagery Interpretation, Reporting, and Exploitation System
IIRK Interarea Interswitch Rekeying Key
IIRS Imagery Interpretability Rating Scale
IIS (1) Indirect Identification System; (2) IPAC Intelligence Summary; (3) Imagery Interpretation Segment
IISE Intelligence Information System Enhancement
IISS Intelligence Information Subsystem
IITLPC Inter/Intra Team Low Power Communications
IITS (1) Intra-Theater Imagery Transmission System; (2) Installation Information Transfer Systems
IIU (1) Imagery Interpretation Unit; (2) Imagery Interface Unit
IJMS Interim JTIDS Message Standard
ILAM Improved Limpet Assembly Modular
ILC International Lines of Communication
ILD Injection Laser Diode
ILE Intelligence Liaison Element
ILEA International Law Enforcement Academy
ILO Intelligence Liaison Officer
ILP Intelligence Liaison Party
ILS (1) Instrument Landing System; (2) Integrated Logistic Support
ILSA Improved Lightweight Satellite Antenna
IM (1) Information Management; (2) Intermodulation
IM/GD Intelligence Management/Guidance Document
IMA (1) Institute for Military Assistance; (2) Intelligence Mobilization Augmentee; (3) Information Mission Area
I-MAE Interim Medium Altitude Endurance UAV (formerly Tier I)
IMAF 1st Marine Amphibious Force
IMAP Interim Mission Assessment Program
IMB (USCENTCOM) Intelligence Management Board
IMC The International Medical Corps
IMCO Intergovernmental Maritime Consultative Organization
IMD Intelligence Management Document
IMEF First Marine Expeditionary Force
IMET (1) International Military Education and Training; (2) Integrated Management Evaluation Team
IMETS Integrated Meteorological System
IMF International Monetary Fund
IMINT Imagery Intelligence
IMIS (1) Intelligence Management Information System; (2) Integrated Management Information System
IMLETT International Maritime Law Enforcement Training Team
IMMP Information Management Master Plan
IMNET Imagery Network
IMOM Intelligence Many-on-Many
IMOC International Maritime Officer Course
IMP (1) Interface Message Processor; (2) Input Message Processor; (3) Image Product; (4) Information Management Program
IMPs Imagery Products
IMS International Military Staff (NATO)
IMSAT Imagery Satellite
IMSE Imagery Management Support Element
IMSO International Maritime Satellite Organization
IMTT Intelligence Mobile Training Team
IN (1) International Negotiations; (2) Intelligence; (3) Infantry; (4) Director of Intelligence (Air Force Component) (also A2)
INA Information Not Available
INCA (1) Intelligence Communications Architecture; (2) Integrated Nuclear Communications Assessment
INCOLLNOM Intelligence Collection Requirement Nomination
INCOMNET Intratheater Intelligence Communications Network
INCSEA Incidents at Sea
INDICOM (1) Indications Communication Network; (2) Indications and Warning Communications
INDICOMM Indications Intelligence Communications
INEWS Integrated Electronic Warfare System
inf Infantry
INF Intermediate-Range Nuclear Forces
INFIL Infiltration
INFLIGHTREP Inflight Reports
INFLTRPT Inflight Reports
INFO Information
INFOSEC (1) Information Security; (2) Information Systems Security
INGO International Nongovernmental Organizations
INI Initiation
INL International Narcotics and Law
INMARSAT International Maritime Satellite
INMS Integrated Network Management System
INR Bureau of Intelligence and Research (State Department)
INS (1) Inertial Navigation System; (2) Immigration and Naturalization Service
INSAT Indian Satellite
INSICOM Integrated Special Intelligence Communications
INSCOM U.S. Army Intelligence and Security Command
INST Instruction
INSTA Automated Installations File (DIAOLS)
INSTAL Installation
instl Installation
INSUM Intelligence Summary
INT/INTEL Intelligence
INTACS (1) Integrated Tactical Communications System; (2) Integrated Tactical Communications Study
INTCP Intercept
INTEL Intelligence
INTELCAST Intelligence Broadcast
INTELCOM Worldwide Intelligence Communication
INTELDATA Intelligence Data
INTELINK Proper Name of System
INTELSAT International Telecommunications Satellite Organization
Intelink Command server/client system that allows secure SCI connectivity to all commands on the network, and access to available files without additional log-on.
INTELNET Intelligence Network Internet International Network
INTI CI database
intg Interrogation
INTRA International Travel by Selected Foreign Officials
Intranet Internet with local scope
INTREP Intelligence Report
INREQ Intelligence Request
INTSUM Intelligence Summary
INUT Indian Nuclear Underground Test
IO (1) Indian Ocean; (2) Intelligence Officer; (3) Information Objectives; (4) Intelligence Objective; (5) Intelligence Operations (Division); (6) Information Operations; (7) Information Objectives
I/O Input/Output
IOA Indian Ocean Area
IOB Intelligence Oversight Board
IOC (1) Initial Operational Capability; (2) Intelligence Operations Center
IOCTL Indian Ocean Conventional Target List
IOD Intelligence Operations Division (USEUCOM)
IOF Intelligence Operations Facility
IOIC Integrated Operational Intelligence Center
IOM Input/Output Module
IOMDWG Interagency Offensive Missile Deployment Working Group
IONDS Integrated Operational Nuclear Detection System
IOR Individualized Operational Ration
IONDS Integrated Operational Nuclear Detection System
IOS (1) Intelligence Operations Specialist; (2) International Organization for Standards
IOSS (1) Integrated Operational Support Study; (2) Intelligence Organization Stationing Study
IOT&E Initial Operational Test and Evaluation
IP (1) Initial Point; (2) Imagery Processing; (3) Intelligence Problem; (4) Instrumentation Point; (5) Immediate Permanent Incapacitation Dose; (6) Internet Protocol
IP/MP Inphase/Midphase
IPA (1) Intelligence Production Activity; (2) Imagery Product Archive
IPAT Intelligence Planning/Programming Analysis Tool
IPB Intelligence Preparation of the Battlefield/Battlespace
IPC (1) Industrial Planning Committee; (2) Intelligence Producers’ Council; (3) Intelligence Production Center
IPCP Intelligence Production Campaign Plan
IPCS Intelligence Producers Council Staff
IPD (1) Intelligence Planning Document; (2) Intelligence Plans Division (USEUCOM); (3) Intelligence Production Division
IPDB Intelligence Production Data Base
IPDS Imagery Processing and Dissemination System
IPE Intelligence Production Element
IPF (1) Integrated Processing Facility; (2) Intelligence Processing Facility (Guardrail)
IPG Implementation Planning Group
IPIR (1) Immediate Photo Interpretation Report; (2) Initial Photographic Interpretation Report; (3) Initial Programmed Interpretation Report; (4) Initial Phase Interpretation Report
IPR Integrated Personal Armor
IPIX Interface Processor for Imagery Exchange
IPM (1) Interface Processor for Imagery Exchange; (2) Intelligence Programs Management
IPMA Intelligence Production Management Activity
IPMO Intelligence Program Management Office
IPL Integrated Priority List
IPM Interpersonal Messaging
IPOIC Interagency Prisoner of War Ad Hoc Committee
IPOM Intelligence Program Objective Memorandum
IPP (1) Intelligence Producer Profile; (2) Impact Point Prediction
IPR (1) Intelligence Production Requirement; (2) In Process Review; (3) Impulse Response; (4) Internet Protocol Route
IPRG (1) Intelligence Priorities Review Group; (2) Intelligence Program Review Board
IPS (1) Integrated Program Summary; (2) Intelligence Production System; (3) Imagery Processing Segment (CARS); (4) Intelligence Production Section; (5) Instructions Per Second; (6) Imagery Processing System
IPSC Information Processing Standards for Computers
IPSG Intelligence Program Support Group (now CISA)
IPSO Internet Protocol Security Option
IPSP Intelligence Priorities for Strategic Planning
IPT Integrated Product Team
IPU Inter-Parliamentary Union
IPW Interrogation of Prisoners of War
IPWG Intelligence Priorities Working Group
IPX Internet Packet Exchange
IR (1) Infrared; (2) Intelligence Information Report; (3) Illumination Rate; (4) Impulse Response; (5) Information Requirement; (6) Intelligence Requirement; (7) Initial Radiation; (8) Induced Radiation; (9) Information Ratio
I2R Imaging Infrared
IRA Intelligence-Related Activities
IRAC Interdepartmental Radio Advisory Committee
IRBM Intermediate-Range Ballistic Missile
IRC (1) International Red Cross; (2) International Rescue Committee
IRCM Infrared Countermeasures
IRCS Improved Radar Calibration System
IR&D Independent Research & Development
IRD (1) Independent Research & Development; (2) Intelligence Resources Division; (3) Intelligence Reserve Detachment
IRDB Integrated Requirements Data Base
IRDC Intelligence Research and Development Council
IRDHS Imagery-Related Data Handling System (see AIRES)
IREMBASS Improved Remotely Monitored Battlefield Surveillance System
IRDS Infrared Detection System
IREMBASS Improved-Remotely Monitored Battlefield Sensor System
IREPS Integrated Refractive Effects Prediction System
IRF (1) Imagery Readiness Facility; (2) Intelligence Readiness Facility
IRG Interdepartmental Regional Group
IRGM Infrared Guidance Module
IRINT Infrared Intelligence
IRIS Infrared Imaging System
IRISA Imagery Report Index Summary
IRISF Intelligence Report Index Summary File
IRK Interswitch Rekeying Key
IRLS Infrared Line Scanner
IRM (1) Intelligence Requirements Management; (2) Information Resource Management
IRMS Imagery Requirements Management System
IROF Imagery Reconnaissance Objectives File
IROL Imagery Reconnaissance Objectives List
IROP (1) Imagery Reconnaissance Objectives Plan; (2) Infrared Optical Intelligence; (3) Imagery Requirements Objectives Program
IRPG Installation Reference Points Graphics
IRPIA Intelligence Information Report Photo Index
IRR (1) Individual Ready Reserve; (2) Intelligence Requirement Request; (3) Intelligence Readiness Report
IRS (1) Intelligence Research Specialist; (2) Internal Revenue Service; (3) Interface Requirements Specification; (4) Intelligence Requirements Subcommittee
IRSCOM Imagery Requirements Subcommittee
IS (1) Information Systems; (2) Intelligence Specialists; (3) Intelligence Squadron
I&S (1) Intelligence and Security; (2) Intelligence and Surveillance
ISA (1) International Security Affairs; (2) Interservice Support Agreement; (3) Intelligence Support Activity; (4) Integration Support Activity; (5) International Support Agreement
ISAF Israeli Air Force
ISAR Inverse Synthetic Aperture Radar
ISARC Intelligence, Surveillance, and Reconnaissance Cell
ISB (1) Initial Staging Base; (2) Intermediate Staging Base; (3) Intelligence Systems Board; (4) Intelligence Support Base
ISC (1) Information Systems Command; (2) Information Science Center; (3) Intelligence Support Cell
ISCO Intelligence Support to Combined Operations
ISC/SC Intelligence Specialist Chief/Senior Chief
ISD (1) Intelligence Support Detachment; (2) Intelligence Security Division; (3) Intelligence Support Division
ISDB Integrated Satellite Data Base
ISDN (1) Integrated Services Data Network; (2) Intelligence Services Digital Network ISEIntelligence Support Element
ISEMS Improved Spectrum Efficiency Modeling and Simulation
ISEW Intelligence, Security, and Electronic Warfare
ISF Intelligence Support Facility (U.S. Navy)
ISG Intelligence Support Group (U.S. Navy)
ISHMRS Improved SOF High Frequency Manpack Radio System
ISIC Intelligence Support and Indications Center
ISID Interim Secondary Imagery Dissemination System
ISIDS Improved SIDS
ISINT Instrumentation Signals Intelligence
ISIP Intelligence Support Interface Program
ISIS (1) Integrated Signals Intelligence System; (2) Interim SOCOM Intelligence Threat Data System
ISLES Information Systems for Law Enforcement Support
ISM Industrial Security Manual
ISMB Intelligence Systems Management Board
ISO (1) Information Systems Office; (2) International Standards Organization
ISOFAC Isolation Facility
ISOPREP Isolated Personnel Report
ISOS Intelligence System of Systems
ISP (1) Intelligence Support Plan; (2) Industrial Security Program; (3) Intelligence Support Processor; (4) Integrated Survey Program; (5) Intelligence Survey Program
ISP DCS Integrated Survey Program Data Collection System
ISP CPE Integrated Survey Program Central Production Element
ISPER IPAC Special Reports
ISPO Intelligence Support Program Office
ISPR Information Systems Processing Request
ISPS (1) ISP Server; (2) Improved SOF Power Sources
ISPT Intelligence Support Processor Tool
ISR (1) Imagery Support Requirement; (2) Inter-Agency Source Registry; (3) Intelligence, Surveillance and Reconnaissance
ISRD Information Systems Requirement Document
ISS (1) Intelligence Support System; (2) Intelligence Support Subsystem; (3) Intelligence Support Staff; (4) Information Security System; (5) Information Systems Security
I&SS Intelligence and Security Service
ISSA (1) Information Systems Support Activity; (2) Inter-service Support Agreement
ISSM Information Systems Security Manager
ISSO (1) Information Systems Security Officer; (2) Intelligence Systems Support Office
ISST ICBM SHF Satellite Terminal
IST (1) Imagery Support Terminal; (2) Intelligence Support Team; (3) Intelligence System Team
ISTA Intelligence, Surveillance, Target Acquisition
ISWG Intelligence Support Working Group
ISYSCON Integrated System Control
IT Immediate Transient Incapacitation Dose
ITA (1) Intelligence Terrain Analyzer; (2) International Telegraph Alphabet
ITAAS Intelligence Training Army Area Schools
ITAC (1) Intelligence and Threat Analysis Center (U.S. Army); (2) Intelligence Tracking Analysis and Correlation
ITACIES Interim Tactical Imagery Exploitation System (U.S. Army)
ITACS Integrated Tactical Air Control System
ITAR International Traffic in Arms Regulations
ITAS Improved Target Acquisition System
ITC Interagency Training Center
ITCT Improved Tactical Commander’s Terminal
ITD (1) Interim Terrain Data; (2) Individual Training Directorate; (3) International Training Division
ITDB Intercept Tasking Data Base
ITDN Integrated Tactical Data Network
ITEP (1) Interim Tactical ELINT Processor (U.S. Army); (2) Integrated Threat Evaluation Program
ITF Intelligence Task Force
ITFN Intra-Task Force Network
ITG Interdiction Target Graphic
ITIBS Improved TIBS
ITIC-PAC INSCOM Theater Intelligence Center-Pacific
ITII Internal-to-Internal Interface
ITL Interagency Telephone Laboratory
ITO (1) International Trade Organization; (2) Integrated Tasking Order
ITOC Interrogation Translation Operations Center
ITP (1) Intelligence Town Plan; (2) Interrogation/Translation Platoon
ITS Imagery Transmission System
ITSS Integrated Tactical Surveillance System
ITT Interrogator Translator Team
ITU (1) Interrogator-Translator Unit; (2) International Telecommunications Union
ITUT Interim Tactical Users Terminal
ITW (1) International Targeting Workstation; (2) Integrated Threat Warning
ITW&AA Integrated Tactical Warning and Attack Assessment
IU (1) Interface Unit; (2) Image Understanding
lUG Intelligence Users’ Guide
IUS Inertial Upper Stage
IUSS Integrated Undersea Surveillance System
IVAN Intelligence Van
IVCS Integrated Vehicle Communications System
IVD Interactive Video Disk
IVIS Inter-Vehicle Information System
IVSN Initial Voice Switched Network
IW (1) Information Warfare; (2) Intelligence Wing
I&W (1) Indications and Warning; (2) Intelligence & Warning
IWC Information Warfare Center
IWD Intermediate Water Depth
IWG Intelligence Working Group
IWO Intelligence Watch Officer
IWS (1) Intelligence Work Station; (2) Information Warfare Squadron
IWSDB Integrated Weapon System Data Base
IWST Information Warfare Support Team
IWT Intelligence Watch Team
IWTS Indications and Warning Training System
IWW Inland Waterway
IX Unclassified Miscellaneous Ship