IAA	Identification, Authentication and Authorization
IAA	IndoleAcetic Acid
IAA	Intelligent Aerodynamic Automobile
IAA	Interior Artifact Analysis
IAA	International Academy of Astronautics
IAB	Independent Accountability Board
IAB	Individual Address Block
IAB	Interactive Advertising Bureau
IAB	Interactive Application Builder
IAB	Internet Advertising Bureau
IAB	Internet Architecture Board
IAC	I Am Cute
IAC	In Any Case
IAC	Independent Accountability Class
IAC	Information Analysis Centre
IAC	Infrastructure As Code
IAC	Inquiry Access Code
IAC	Inter-Academy Council
IAC	Interdiction and Asset Confiscation
IAC	International AVS Centre
IAC	Internet Access Control
IAC	Interpret As Command
IAC	[IBM] International Administrative Center
IAD	Incremental Application Development
IAD	Integrated Access Device
IAD	Interface Analysis Document
IAD	Internet Applications Division
IAE	In Any Event
IAE	Incoming Alignment Error
IAE	International Aero Engines
IAF	In Another File
IAF	Initial Approach Fix
IAF	Internet Address Finder
IAF	Islamic Action Front
IAF	Israel Air Force
IAF	Italian Air Force
IAG	Intelligence Analysis Group
IAG	InterActive Graphics
IAG	International Airlines Group
IAH	International Association of Hydrogeologists
IAI	Inactive Aircraft Inventory
IAI	Institute of Art and Ideas
IAI	Internet Application Integration
IAI	Israel Aircraft Industries
IAJ	Institute of Actuaries of Japan
IAK	Internet explorer Administrator Kit
IAL	Immediate Action Limit
IAL	Intel Architecture Labs
IAL	International Auxiliary Language
IAM	Identity and Access Management
IAM	Initial Address Message
IAM	Institute of Advanced Motorists
IAM	Institute of Aviation Medicine
IAM	Integrated Assessment Modeling
IAM	Interactive Algebraic Manipulation
IAN	International Affairs Network
IAO	Information Awareness Office
IAO	Instrumentation Application Operation
IAO	Isis Apophis Osiris
IAP	In-Application Purchase
IAP	Information As Product
IAP	Intellectual Asset Protection
IAP	InterAction Point
IAP	International Advisory Panel
IAP	International Airlines Publications
IAP	Internet Access Provider
IAP	Islamic Association for Palestine
IAP	[MIT] Independent Activities Period
IAQ	Indoor Air Quality
IAQ	Infrequently Answered Question
IAR	Infantry Automatic Rifle
IAR	Initial Address Reject
IAS	Immediate Access Storage
IAS	Indicated Air Speed
IAS	International Accounting Standards
IAS	International Army Staff
IAS	International Association of Scientology
IAS	Internet Advertising Service
IAS	Internet Authentication Service
IAS	Invasive Alien Species
IAT	Implicit Association Test
IAT	ING Alert Tool
IAT	International Atomic Time
IAT	Issued AT
IAT	It's All Text!
IAU	Ice Age Unit
IAU	International Astronomical Union
IAV	Initialization Alignment Vehicle
IAV	Intermediate Audio/Video
IAV	Inventing the AIDS Virus
IAV	Inventory Adjustment Voucher
IAW	In Accordance With
IAW	In Another World
IAX	Inter-Asterisk eXchange
IAX	International Asset eXchange
IAY	Institute for the Study of Antisocial Behavior in Youth
IAZ	Inner Artillery Zone
IBA	IBurst Association
IBA	Independent Broadcasting Authority
IBA	Indigenous Business Australia
IBA	Institute of Business Advisers
IBA	Intelligent Bladestore Architecture
IBA	Interceptive Body Armor
IBA	International Bar Association
IBA	International BAseball [Federation]
IBA	International Boxing Association
IBA	Irish Brokers Association
IBA	Israel Broadcasting Authority
IBB	I'll Be Back
IBB	Installed Base Business
IBC	Ice Bucket Challenge
IBC	Inside Back Cover
IBC	InsideBusiness Connect
IBC	Interleaved Build Chains
IBC	International Broadcast Convention
IBC	International Business Channel
IBD	I Back Down
IBD	Inflammatory Bowel Disease
IBD	Investment Banking Division
IBD	Investor Business Daily
IBE	Inboard Booster Engine
IBE	Internet-Based Education
IBF	I'll Be Fucked
IBF	ING Banking Framework
IBF	International Boxing Federation
IBF	Internet Business Framework
IBG	International Bike Group
IBG	International Biometric Group
IBG	Internet Business Group
IBH	Initial BeachHead
IBI	I Believe It
IBI	In-Branch [credit card] Issuance
IBI	Intel Boot Initiative
IBI	Interactive Binary Illusions
IBI	Intercontinental Bureau of Investigations
IBI	Interstellar Bureau of Investigations
IBJ	Illinois Business Journal
IBK	Idiot Behind Keyboard
IBK	Industrial Bank of Korea
IBL	Internet Baseball League
IBM	I Block Money
IBM	Infernal Bloody Mess
IBM	Ingrained Batch Mentality
IBM	International Blizzard Makers
IBM	International Brotherhood of Magicians
IBM	International Brotherhood of Malevolence
IBM	International Business Machines
IBM	Intragalactic Bowel Movements
IBM	Itty Bitty Machines
IBN	Integrated Business Network
IBO	International Broadcasting Organization
IBO	Internet-Based Offering
IBP	Initial Boiling Point
IBP	Inner Balance Piston
IBP	Inside Business Payments
IBP	Internet-Based Presentation
IBP	Iowa Beef Processors
IBQ	Individual Bycatch Quota
IBQ	Infant Behavior Questionnaire
IBQ	Initrode Business Quotients
IBR	It's Been Real
IBS	IBM Business School
IBS	Inflatable Boat, Small
IBS	InsideBusiness Services
IBS	Integrated Battlefield Solutions
IBS	International Baggage Security
IBS	International Broadcasting Standard
IBS	International Builders' Show
IBS	Irritable Bowel Syndrome
IBT	Income Before Tax
IBT	Indirect Branch Tracking
IBT	International Broadcasting Trust
IBU	International Biathlon Union
IBV	Infectious Bronchitis Virus
IBV	Information Behaviors and Values
IBW	Internal Bore Welding
IBX	Integrated Business eXchange
IBX	Internet Business eXchange
IBY	Invitations By You
IBZ	Inner Border Zone
ICA	IBM Customer Agreement
ICA	Independent Cost Analysis
ICA	Information Connection Architecture
ICA	Initial Configuration Audit
ICA	Institute of Cost Analysis
ICA	Intelligence Community Assessment
ICA	Item Control Area
ICA	[Citrix] Independent Computing Architecture
ICB	Internal Cash Balancing
ICB	International Competitive Bidding
ICB	Interstate Computer Bank
ICB	[IBM] Integrated Cluster Bus
ICC	IAPS Card Cage
ICC	Information Coordination Control
ICC	Intelligent Content Conference
ICC	Internal Complaints Committee
ICC	International Center of Competency
ICC	International Chamber of Commerce
ICC	International Color Consortium
ICC	International Criminal Court
ICC	Interrupt Controller Communications
ICC	Interstate Commerce Commission
ICC	Interstellar Commerce Commission
ICC	Item Category Code
ICC	[USA] Indian Claims Commission
ICD	In-Circuit Debugger
ICD	Installable Client Driver
ICD	Installation Control Drawing
ICD	Integer Coded Decimal
ICD	Interactive Call Distribution
ICD	Interface Control Document
ICD	International Code Designator
ICD	International [Statistical] Classification of Diseases [and Related Health Problems]
ICE	IBM Certification Exam
ICE	Immigration and Customs Enforcement
ICE	In Case of Emergency [number]
ICE	In Circuit Emulator
ICE	Incarcerate, Cannot Execute
ICE	Independent Cost Estimate
ICE	Information and Content Exchange
ICE	Information Center for the Environment
ICE	Institution of Civil Engineers
ICE	Integrated Collaborative Environment
ICE	Intelligent Concept Extraction
ICE	Interactive Color Editor
ICE	Interactive Connectivity Establishment
ICE	InterCity Express
ICE	InterClient Exchange
ICE	InterContinental Exchange
ICE	Internal Combustion Engine
ICE	Internal Compiler Error
ICE	International Challenge for Eclipse
ICE	International Cometary Explorer
ICE	Internet Communications Engine
ICE	Interval Control Element
ICE	Intrusion Countermeasures Electronics
ICF	Identical Code Folding
ICF	Initial Context Factory
ICF	Internet Component Framework
ICF	Internet Connection Firewall
ICF	Internet Content Filtering
ICF	IntraCellular Fluid
ICF	[IBM] Internal Coupling Facility
ICG	Interactive Computer Graphic
ICG	International Crisis Group
ICH	I/O Controller Hub
ICH	Intelligent Connection Handling
ICI	Imperial Chemical Industries
ICI	InterChannel Interference
ICJ	I Can't Jump
ICJ	International Commission of Jurists
ICJ	International Court of Justice
ICK	Integrated Circuit Keyset
ICL	Income Contingent Loan
ICL	International Computers Limited
ICM	I Can't Move
ICM	Image Color Management
ICM	Image Colour Matching
ICM	Image Compression Manager
ICM	Institute of Cereals of Mozambique
ICM	Integrated Call Management
ICM	Intellectual Capital Management
ICN	Illustration Control Number
ICN	Implementation Change Notice
ICN	Information and Communication Network
ICN	Input Change Notification
ICN	InsideClimate News
ICN	Internet Call Notification
ICN	Iowa Communications Network
ICO	Import Compliance Office
ICO	Information Commisioner's Office
ICO	Initial Code Offering [Program]
ICO	Initial Coin Offering
ICO	Instinctive Cut Out
ICO	Intermediate Circular Orbit
ICO	Intersight Cloud Orchestrator
ICP	In Circuit Programming
ICP	Inductively Coupled Plasma
ICP	Initial Connection Protocol
ICP	Insane Clown Posse
ICP	Installed Communications Performance
ICP	Integrated Channel Processor
ICP	Intel Celeron Processor
ICP	Intelligent Content Processing
ICP	InterCranial Pressure
ICP	Interface Change Procedure
ICP	Interlaced Chroma Problem
ICP	Internet Cache Protocol
ICP	Internet Commerce Provider
ICP	Internet Content Provider
ICP	Internet Control Protocol
ICP	Inventory Control Point
ICP	Island Computer Products
ICQ	Instruction Completion Queue
ICQ	Intermediate Container Quantity
ICR	Initial Cell Rate
ICR	Intel Channel Rebate
ICR	Intelligent Character Recognition
ICR	Intermediate Common Room
ICS	IBM Cabling System
ICS	Ice Cream Sandwich
ICS	In Control of Services
ICS	Indian Civil Service
ICS	Industrial Control Systems
ICS	Infrequent Critical Section
ICS	Insecure Control Systems
ICS	Integrated Circuit Solutions
ICS	Integrated Computer Solutions [Incorporated]
ICS	Interface Control Specification
ICS	Interim Contractor Support
ICS	Interleaved/Cycle-Switched
ICS	International Centipede Station
ICS	International Chamber of Shipping
ICS	International Commission on Stratigraphy
ICS	International Corruption Squad
ICS	Internet Caching System
ICS	Internet Connection Sharing
ICS	Irritable Climate Syndrome
ICS	[IBM CrossWorlds] InterChange Server
ICT	Ideal Cycle Time
ICT	Image Constraint Token
ICT	In-Circuit Test
ICT	Individual and Collective Training
ICT	Information and Communications Technology
ICT	Institute of Computing Technology
ICT	Integrated Concept Team
ICT	Interactive Consumer Terminal
ICT	International Call for Tenders
ICT	International Campaign for Tibet
ICT	International Computers & Tabulators
ICU	IBM Channels University
ICU	Instrument Comparator Unit
ICU	Intensive Care Unit
ICU	Interface Control Unit
ICU	Inventory of Callous-Unemotional [Traits]
ICU	[FBI] International Corruption Unit
ICV	Infantry Combat Vehicle
ICV	Integrity Check Value
ICW	In Conjunction With
ICW	Interpersonal Communications Workshop
ICX	Inter-Cartridge eXchange
ICX	Internet Content Accelerator [!]
ICY	International Cooperation Year
ICZ	Initial Contact Zone
IDA	Image Display and Analysis
IDA	Inflight Date Adjustment
IDA	Infocomm Development Authority [of Singapore]
IDA	Institute for Defense Analysis
IDA	Interactive DisAssembler
IDA	Interchange of Data between Administrations
IDA	Intercommunication Data Areas
IDA	International Dark-sky Association
IDA	International Development Agency
IDA	International Development Association
IDA	International Docking Adapter
IDA	Irish Development Agency
IDB	Illicit Diamond Buying
IDB	Islamic Development Bank
IDC	I Don't Care
IDC	Insulation Displacement Contact
IDC	InterDisciplinary Center
IDC	International Data Corporation
IDC	Internet Data Center
IDC	Internet Database Connector
IDC	Item Designator Code
IDC	[Intel] Israel Development Center
IDD	Insulting, Demeaning, Domineering
IDD	Interface Design Description
IDD	Interface Design Document
IDD	Interface Diagnostic Diagrams
IDD	International Direct Dial
IDD	Interval Decision Diagram
IDE	Innovative Design Expertise
IDE	Integrated Development Environment
IDE	Integrated Device Electronics
IDE	Interactive Development Environments, Incorporated
IDF	InDirect Fire
IDF	Intel Developer Forum
IDF	Intelligent Documentation Framework
IDF	Intermediate Distributing Frame
IDF	International Diabetes Federation
IDF	International Drilling Federation
IDF	Israel Defence Forces
IDG	Integrated Drive Generator
IDG	Inter-Dialog Gap
IDH	InDirect Hire
IDI	Initial Domain Identifier
IDJ	International Disk Jockey
IDK	I Don't Know
IDL	Interactive Data Language
IDL	Interface Definition Language
IDL	Interface Description Language
IDM	IDentity Management
IDM	Ignition Diagnostic Module
IDM	Image Data Manager
IDM	Information & Data Management
IDM	Interactive and Digital Media
IDN	Integrated Digital Network
IDN	International Directory Network
IDN	Internationalized Domain Names
IDO	Initial Dissolved Oxygen
IDP	Idiot Datagram Protocol
IDP	Independent Development Program
IDP	Individual Development Program
IDP	Initial Domain Part
IDP	Integrated Data Processing
IDP	Internally Displaced People
IDP	International Drivers Permit
IDP	Internetwork Datagram Protocol
IDP	Interplanetary Dust Particle
IDQ	Instructional Design and Quality
IDR	Initial Design Review
IDR	Input Data Records
IDR	Installation Design Responsibility
IDR	Instantaneous Decoding Refresh
IDR	Instrumentation Design Responsibilities
IDR	Inter-Domain Routing
IDS	I Don't See
IDS	Ice Detection System
IDS	Ideographic Description Sequence
IDS	Information Disclosure Statement
IDS	Informix Dynamic Server
IDS	Initialise Distro Series
IDS	Institute of Development Studies
IDS	Integrated Data Store
IDS	Integrated Development Systems
IDS	Integrated Display System
IDS	Interactive Diagnostic System
IDS	InterDictive Strike
IDS	Interface Design Specification
IDS	Internal Directory System
IDS	Interoperability Design Specification
IDS	Intrusion Detection System
IDT	Invention Disclosure Team
IDU	I Don't Understand
IDU	Integrated Drive Unit
IDU	Interface Data Unit
IDV	Interlibrational Derived Vehicle
IDW	Intellectual Dark Web
IDW	Investigation-Derived Waste
IDX	Improved Dispersed eXplosives
IDX	Integrated Digital eXchange
IDY	International Design Yearbook
IDZ	Inner Defense Zone
IEA	Institute of Economic Affairs
IEA	International Energy Agency
IEA	International Ergonomics Association
IEA	Ion Energy Analysis
IEB	Immigration Enquiry Bureau
IEB	Import Entry Bond
IEB	Independent Examination Board
IEB	Industrial Energy Bulletin
IEB	Industrial Ethernet Book
IEB	Initial Evaluation Board
IEB	Initial Evaluation Briefing
IEB	Inland Empire Branch
IEB	Inner Ear Biology
IEC	IAPS Environmental Control Module
IEC	Infused Emitter Coupling
IEC	InterExchange Carrier
IEC	International Electrotechnical Commission
IEC	International Engineering Consortium
IEC	Interoperability Executive Customer [Council]
IEC	[IBM] International Education Centre
IED	Improvised Explosive Device
IED	Insertion Extraction Device
IED	Invade Evangelise Deliver
IEE	Initial Environmental Examination
IEE	Institution of Electrical Engineers
IEF	Integrity Enhancement Feature
IEF	Interplanetary Electric Field
IEI	Information Element Identifier
IEL	IEEE/IEE Electronic Library
IEM	International Environmental Management [Company Limited]
IEN	Internet Engineering Notes
IEN	Internet Experiment Notebook
IEP	Independent Evaluation Plan
IEP	Institute for Economics and Peace
IER	IBM E-Records
IER	Institute for Energy Research
IES	Information Exchange System
IES	Interleaved/Event-Switched
IFA	ImmunoFluorescent Assay
IFA	Independent Financial Adviser
IFB	Invitation For Bids
IFB	Irish Film Board
IFC	Information Flow Control
IFC	Inside Front Cover
IFC	Intergalactic Fried Chicken
IFC	International Finance Corporation
IFC	International Freighting Corporation
IFD	Image File Directory
IFD	Invariant Factor Decomposition
IFE	In Flight Entertainment
IFF	Identification Friend or Foe
IFF	Interchange File Format
IFF	Iterative Function Fractal
IFG	Inter-Frame Gap
IFJ	International Federation of Journalists
IFL	I Fucking Love
IFL	International Frequency List
IFL	Interstellar Frungy League
IFL	[IBM] Integrated Facility for Linux
IFM	Instantaneous Frequency Measurement
IFM	Institute for Functional Medicine
IFP	Interactive Fast Path
IFQ	Instruction Fill Queue
IFQ	International Fare Quote
IFR	I Follow Roads
IFR	Infection Fatality Rate
IFR	Instrument Flight RADAR
IFR	Instrument Flight Rules
IFR	Integral Fast Reactor
IFS	Inherited FileSystem
IFS	Input Field Separator
IFS	Installable File System
IFS	Institute for Fiscal Studies
IFS	Inter Frame Space
IFS	Internal Field Separator
IFT	I Fucked Ted
IFT	Instrument Flight Trainer
IFT	Integrated Flight Team
IFU	Instruction Fetch Unit
IFU	InterFace Unit
IFV	Infantry Fighting Vehicle
IGA	IBM Global Account
IGA	Integrated Grid Architecture
IGA	Inter-Granular Attack
IGB	Inlet Gear Box
IGC	IBM Global Campus
IGD	It's Going Down
IGF	IBM Global Financing
IGF	Independent Game Festival
IGF	Insulin Growth Factor
IGF	Interactive Graphics Facility
IGF	Internet Governance Forum
IGG	ImmunoGlobulin G
IGI	Investigative Group International
IGL	Ideal Gas Law
IGM	Idealized Greenhouse Model
IGM	ImmunoGlobulin M
IGM	InterGalactic Medium
IGO	Inter Granular Oxidation
IGP	Integrated Gateway Processor
IGP	Integrated Graphics Processor
IGP	Interior Gateway Protocol
IGS	Institute of Governmental Studies
IGS	Interactive Graphics Systems
IGS	Internet Graphics Service
IGT	International Game Technology
IGV	Inlet Guide Vane
IGW	Integrated GateWay
IGW	Internet GateWay
IGY	International Geophysical Year
IHC	Intermediate Holding Company
IHD	Intermittent HemoDialysis
IHF	Intermittent HemoFiltration
IHF	Inventory History File
IHG	I Hate Go
IHL	Institute of Higher Learning
IHL	Internet Header Length
IHP	Indicated HorsePower
IHQ	Insurance House of Queensland
IHQ	International HeadQuarters
IHR	International Health Regulation
IHS	Integrated Heat Spreaders
IHS	Integrated Hospital Support
IHT	International Herald Tribune
IHV	Independent Hardware Vendor
IIA	Information Industry Association
IIA	Interactive Internet Activities
IIA	International Intelligence Agency
IIB	Internet In Business [convention]
IIC	Impersonal Interrogative Comment
IIE	Institute of Industrial Engineers
IIF	Institute of International Finance
IIG	International Internet Gateway
III	Institute for Information Industry
III	Interstate Identification Index
III	Item Inspection Instructions
IIL	Integrated Injection Logic
IIM	Indian Institute of Management
IIN	Industry Identification Number
IIN	Integrated Information Network
IIR	Imaging InfraRed
IIS	Integrated Information Systems
IIS	Interface Instruction Sheet
IIS	Investors In Software
IIS	[Microsoft] Internet Information Services
IIT	Illinois Institute of Technology
IIT	Indian Institutes of Technology
IJE	International Journal of Epidemiology
IJG	Independent JPEG Group
IJN	Imperial Japanese Navy
IJS	InkJet Server
IJT	Integrated Joint Team
IKB	Internal Knowledge Base
IKE	Internet Key Exchange
IKF	Integrated Kent Franchise
IKP	Instructors and Key Personnel
IKR	I Know, Right?
IKS	Intersight Kubernetes Service
ILA	Intermediate-Level Action
ILB	Inner Lead Bond
ILB	Instruction Load Buffer
ILC	ING Learning Centre
ILC	Instruction Location Counter
ILC	Intranet Labor Claiming
ILD	Injection LASER Diode
ILD	Inter-Layer Dielectric
ILE	Integrated LAN Engine
ILI	Influenza-Like Illness
ILI	International League of Intellectuals
ILI	International Lift Industry [Company, Ltd.]
ILL	InterLibrary Loan [Department]
ILM	Independent Landing Monitor
ILM	Industrial Light and Magic
ILM	Information Lifecycle Management
ILO	Integrated Lights-Out
ILO	Integrated Logistic Overhaul
ILO	[UN] International Labour Organisation
ILP	Inductive Logic Programming
ILP	Instruction-Level Parallelism
ILP	Integer Linear Program
ILR	Indefinite Leave to Remain
ILR	Instruction-Level Reuse
ILR	Integrated Logistic Review
ILS	IBM Learning Services
ILS	Instrument Landing System
ILS	Integrated Library System
ILS	Integrated Logistic Support
ILS	International Launch Services
ILS	Internet Location Server
ILS	Intra-cavity Laser Spectroscopy
ILS	Inventory Location System
ILT	Instructor-Led Training
ILU	Inter-Language Unification [System]
ILV	Industrial Launch Vehicle
ILV	Intra-Luminal Vesicle
IMA	Information Mission Area
IMA	Integrated Modular Avionics
IMA	Interactive Multimedia Association
IMA	Intermediate Maintenance Activity
IMA	InterModule Analysis
IMB	IMage Buffer
IMB	Intelligent Message Broker
IMB	International Maritime Bureau
IMC	Information Management Centre
IMC	ING Mobility Centre
IMC	Instrument Meteorological Conditions
IMC	Integrated Memory Controller
IMC	Interagency Management Council
IMC	International Medical Corps
IMC	[HP] Intelligent Management Center
IMD	Industry Marketing Development
IMD	Information Management Division
IMD	Information Management Domain
IMD	Institute for Management Development
IMD	InterMetal Dielectric
IMD	InterModulation Distortion
IME	In My Experience
IME	Indirect Manufacturing Expense
IME	Input Method Editor
IME	Inside Middle East
IME	Institute of Mechanical Engineers
IME	Integrated Maintenance Environment
IME	Integrated Mapping Exercise
IME	Integrated Mission Environment
IME	Intel Management Engine
IME	International Materiel Evaluation
IMF	Impossible Missions Force
IMF	Inherent Maintenance Factor
IMF	International Monetary Fund
IMF	Interplanetary Magnetic Field
IMG	Infant Memory Generators
IMI	Imbedded Message Identifier
IMI	Intermediate Maintenance Instructions
IMI	International Migration Initiative
IML	Integrated Management Log
IML	International Markup Language
IMM	Input Message Manual
IMM	Integrated Material Manager
IMM	Intermediate Maintenance Manual
IMM	Intersight Managed Mode
IMN	Islamic Movement of Nigeria
IMO	In My Opinion
IMO	International Maritime Organization
IMP	Imposed Monopoly Privileges
IMP	Independent Motion Picture [Company]
IMP	Integrated Management Plan
IMP	Interception Modernisation Programme
IMP	Interface Message Processing
IMP	Internet Message Processor
IMP	Internet Messaging Program
IMR	Internet Monthly Report
IMS	I aM Sorry
IMS	Information Management System
IMS	Integrated Maintainability System
IMS	Integrated Management System
IMS	Integrated Measurement System
IMS	Intermediate Maintenance Standards
IMS	International Military Staff
IMS	Inventory Management System
IMS	Ion Mobility Spectroscopy
IMS	IP Multimedia Subsystem
IMS	IV&V Management System
IMS	[Citrix] Installation Management Services
IMT	Image Management Terminal
IMT	Inter-Machine Trunk
IMT	Intermediate Maintenance Technician
IMT	International Mobile Telecommunications
IMU	Inertial Measuring Unit
IMU	Islamic Movement of Uzbekistan
IMV	Instrumented Measurement Vehicle
IMV	Invasive Mechanical Ventilation
IMW	International Memory Workshop
IMZ	Internal Mail Zone
INA	Information Not Available
INA	Internal Notification Application
INA	[USA] Immigration and Nationality Act
INC	Ijaw National Congress
INC	InterNational Carrier
INC	Iraqi National Congress
IND	[UK] Immigration & Nationality Directorate
INF	Implicative Normal Form
INF	Intermediate Nuclear Forces
INL	Inter Node Link
INN	Inter Node Network
INN	Israel National News
INP	Ice Nucleating Particle
INP	Innovative Naval Prototype
INP	Intelligent Networking Pack
INP	Inter Nodal Processing
INR	Initial Nuclear Radiation
INS	Inertial Navigation System
INS	Information Network System
INS	[IBM] Integrated NetFinity Server
INS	[USA] Immigration and Naturalization Service
INU	Inertial Navigation Unit
IOA	Islands Of Automation
IOB	Ignore Old Breakpoints
IOB	Input/Output Block
IOB	Intelligence Oversight Board
IOB	Inter-Operator Billing
IOB	Internet Of Bodies
IOC	Indicator Of Compromise
IOC	Initial Operational Capability
IOC	Initial Operational Clearance
IOC	Input/Output Computer
IOC	Input/Output Controller
IOC	Intergovernmental Oceanographic Commission
IOC	International Olympic Committee
IOC	International Operating Center
IOC	Inversion Of Control
IOD	Identified Outward Dialing
IOD	[FBI] International Operations Division
IOD	[Thai] Institute Of Directors
IOE	Internet Of Everything
IOE	Internet Operating Environment
IOF	International Orienteering Federation
IOI	International Olympiad in Informatics
IOI	Item Of Interest
IOL	Initial Outfitting List
IOL	IntraOcular Lens
IOM	Installation, Operations, and Maintenance
IOM	Integrated Overviews of Malawi
IOM	International Organization for Migration
IOM	Isle Of Man
ION	In Other News
ION	Internet Only Network
ION	Internetworking Over NBMA
IOP	Input/Output oPeration
IOP	Input/Output Processor
IOP	Institute Of Physics
IOP	Integrated Offload Processor
IOP	Internal Operating Procedure
IOP	[CORBA] Inter-ORB Protocol
IOR	Indian Ocean Region
IOR	Interoperable Object Reference
IOR	Issue On Request
IOS	Index-Only Scan
IOS	Input/Output Stream
IOS	Inspration Operating System
IOS	Instructor Operator Station
IOS	Intel Online Services
IOS	[Cisco] Internet Operating System
IOT	Initial Operational Test
IOT	Inter-Operator Tariffs
IOT	International Outage Technology
IOT	Internet Of Things
IOT	InterOffice Trunk
IOU	I Owe yoU
IOU	Investor-Owned Utility
IOV	Input/Output Virtualization
IOV	Intever OVerflow
IOW	In Other Words
IOW	International Office for Water
IPA	Ideal Pricing Architecture
IPA	Indian Pale Ale
IPA	Information-technology Promotion Agency
IPA	Initial Provisioning Agency
IPA	Institute of Public Affairs
IPA	Instrumented Production Aircraft
IPA	Inter-Procedural Analysis
IPA	Intermediate Power Amplifier
IPA	Internal Portal Application
IPA	International Phonetic Alphabet
IPA	International Publishers Association
IPA	Internet Performance Axis
IPA	Investigatory Powers Act
IPA	Investment Program Association
IPB	Illustrated Parts Breakdown
IPC	Illustrated Parts Catalog
IPC	Industrial Planning Committee
IPC	Information Processing Centre
IPC	Instructions [issued] Per Cycle
IPC	Integrated Personal Computer
IPC	Integrated Printed Circuit
IPC	Inter-Process Communication
IPC	Intermediate Pressure Compressor
IPC	Inventory Process Control
IPC	IPhone Conservative
IPC	[Institute of] Interconnecting and Packaging Circuits
IPD	Illustrated Provisioning Document
IPD	Implementation Parameter Descriptor
IPD	Improved Point Defense
IPD	Industrial Products Division
IPD	Initial Provisioning Document
IPD	Integrated Product Development
IPE	Improved Performance Engine
IPE	Integrated Product Electronics
IPE	Integrated Programming Environment
IPE	International Petroleum Exchange
IPF	Idiopathic Pulmonary Fibrosis
IPF	Individual Performance Factor
IPF	Initial Production Facilities
IPF	Itanium Processor Family
IPG	Information Power Grid
IPG	Institute for Pig Genetics
IPG	Internet Press Guild
IPI	Individually Prescribed Instruction
IPI	Institute for Policy Innovation
IPI	Intel Product Integrator [program]
IPI	Intellectual Property Institute
IPI	Intelligent Peripheral Interface
IPI	International Pricing Index
IPI	InterProcessor Interrupt
IPK	International Prototype Kilogram
IPL	IBM Public License
IPL	Illustrated Parts List
IPL	Initial Program Load
IPL	Initial Provisioning List
IPL	Interrupt Priority Level
IPL	Ion Projection Lithography
IPL	[Intel] Image Processing Library
IPM	Impulses Per Minute
IPM	Intelligent Platform Management
IPM	International Pleasure Machines
IPM	Internet Presence Management
IPM	Interruptions Per Minute
IPM	Investment Precious Metals
IPM	Iteration Planning Meeting
IPN	InterPlanetary interNet
IPO	Initial Public Offering
IPO	Intellectual Property Office
IPO	Inter-Procedural Optimizer
IPO	Interdecadal Pacific Oscillation
IPO	Internal Product Ordering
IPO	International Procurement Office
IPO	International Project Office
IPO	It's Probably Over
IPO	It's Probably Overpriced
IPP	Indeterminate [Sentence] for Public Protection
IPP	Industrial Practice Program
IPP	Initial Provisioning Programme
IPP	Innovative Partnerships Program
IPP	Institute for Petroleum Products
IPP	Integrated Performance Primitives
IPP	Integrated Power Package
IPP	Internet Printing Protocol
IPP	Invoice and Payment Procedure
IPP	Irish Parliamentary Party
IPR	In-Process Review
IPR	Initial Program Request
IPR	Institute of Plasma Research
IPR	Intellectual Property Rights
IPR	Internal Processor Register
IPS	Image Packaging System
IPS	In-Plane Switching
IPS	Inches Per Second
IPS	Independent Power Systems
IPS	Induced Pluripotent Stem [Cell]
IPS	Inertial Pointing System
IPS	Information Processing Standards
IPS	Inlet Particle Separator
IPS	Institute of Purchasing and Supply
IPS	Integrated Production Systems
IPS	Integrated Program Summary
IPS	Intel Premier Support
IPS	Intelligent Power Sharing
IPS	Internet Protocol Suite
IPS	InterPlanetary Superhighway
IPS	Intrusion Prevention System
IPS	[Office of] Information Programs and Services
IPT	Ideal Process Time
IPT	Identity Protection Technology
IPT	Integrated Product Team
IPT	Intermediate Pressure Turbine
IPT	Investigative Project on Terrorism
IPU	Image Processing Unit
IPU	Interface Processor Unit
IPV	In Predicate Value
IPV	Intimate Partner Violence
IPX	Internetworked Packet eXchange
IPY	International Polar Year
IQA	Information Quality Act
IQC	Indefinite Quantity Contract
IQN	ISCSI Qualified Name
IQR	InterQuartile Range
IRA	Independent Rear Access
IRA	Individual Retirement Account
IRA	Integrated Register Allocator
IRA	Internet Research Agency
IRA	Interprocedural Register Allocation
IRA	Irish Republican Army
IRB	Inbound Recovery Board
IRB	Indirect Reference Buffer
IRB	Institutional Review Board
IRB	Irish Republican Brotherhood
IRC	Information Resource Center
IRC	International Rally Challenge
IRC	International Record Carrier
IRC	International Rescue Committee
IRC	International Rescue Corps
IRC	Internet Relay Chat
IRD	Ice Rafted Debris
IRD	Implementation Row Descriptor
IRD	Intelligent Resource Director
IRD	Interest-Rate Derivatives
IRD	Interface Requirements Document
IRD	Investment Recovery Department
IRE	Institute of Radio Engineers [later IEEE]
IRE	Instrument Rating Examiner
IRF	Immediate Reaction Force
IRF	Inherited Rights Filter
IRF	Integer Register File
IRF	International Renaissance Foundation
IRF	International Resistance Foundation
IRG	ING Resource Governor
IRG	InterRecord Gap
IRI	International Republican Institute
IRI	International Research Institute
IRI	Internationalized Resource Identifier
IRL	In Real Life
IRM	Information Resource Management
IRM	Information Resource Manager
IRM	Information Rights Management
IRM	Information Risk Management
IRM	Inherited Rights Mask
IRM	Intelligent Repeater Module
IRM	International Routing and Messaging
IRN	Independent Radio News
IRN	Intermediate Routing Node
IRN	Internal Recurrent Neural network
IRO	Islamism-Related Offence
IRP	Integrated Refuel Panel
IRP	Intermediate Rated Power
IRQ	Interrupt ReQuest
IRR	Institute of Race Relations
IRR	Internal Rate of Return
IRR	Issue Release/Receipt [Document]
IRS	Inertial Reference System
IRS	InfraRed Signature
IRS	Interest Rate Swap
IRS	Interface Requirements Specification
IRS	Internal Report Statement
IRS	[UK] Inland Revenue Service
IRS	[USA] Internal Revenue Service
IRT	Incident Review Team
IRT	Instrument Rating Test
IRU	Indefeasible Rights of Use
IRU	Inertial Reference Unit
IRV	Instant Runoff Voting
ISA	Industry Standard Architecture
ISA	Infrastructure Solution Architecture
ISA	Instrument Society of America
ISA	Integrated Safety Analysis
ISA	Intelligence Support Activity
ISA	Intelligent Software Agent
ISA	Internal Security Act
ISA	Internal Security Agency
ISA	International Space Agency
ISA	International Standard Atmosphere
ISA	Internet Security and Acceleration [Server]
ISA	Interservice Support Agreement
ISA	Iran Sanctions Act
ISA	[Intel] Itanium Solutions Alliance
ISA	[processor] Instruction Set Architecture
ISB	Inter-System Bus
ISB	International School of Bangkok
ISC	Industry Steering Council
ISC	Information Services Center
ISC	Information Systems Command
ISC	Initiative for Software Choice
ISC	Inner Space Center
ISC	Integrated Systems Controller
ISC	Intelligence and Security Committee
ISC	Inter-System Connection
ISC	Interactive Systems Corporation
ISC	International Switching Center
ISC	Internet Software Consortium
ISC	Internet Storm Center
ISC	Internet Systems Consortium
ISC	InterStellar Credits
ISC	InterSystem Communication
ISC	It's Safety Critical
ISC	[Gcom] InterSync Controller
ISC	[IBM] InterSystem Coupling
ISD	In Service Date
ISD	In Service Demonstration
ISD	Independent System Development
ISD	Infrastructure Systems Development
ISD	Instanteneous Spontaneous Discharge
ISD	Institute for Strategic Dialogue
ISD	Integrated System Design
ISE	Identity Services Engine
ISE	Industrial Systems Engineering
ISE	Intermediate Support Element
ISE	International Securities Exchange
ISF	Information Security Forum
ISF	Information Systems Factory
ISF	Ink Serialized Format
ISF	Iraqi Security Forces
ISG	Indo-Siam Group
ISG	Industry Steering Group
ISG	International Software Group [Incorporated]
ISH	Industry Solution for Hospitals
ISH	Integrated Surface Hourly
ISH	Intermediate System Hello
ISI	ImageSat International
ISI	Information Sciences Incorporated
ISI	Information Sciences Institute
ISI	Information Society Index
ISI	Intelligent Serial Interface
ISI	Inter Symbol Interference
ISI	Islamic State of Iraq
ISI	[JHU] Information Security Institute
ISI	[Pakistani] Inter-Services Intelligence [Agency]
ISL	In-Situ Leach
ISL	Integer Set Library
ISL	Integrated Stock List
ISL	Inter-Switch Link
ISL	Interface Signal List
ISL	[ILU] Interface Specification Language
ISM	Incremental Sampling Methodology
ISM	Inductor Super Magnetron
ISM	Industrial, Scientific and Medical
ISM	Information Security Management
ISM	Information Security Manual
ISM	Institute for Supply Management
ISM	International Solidary Movement
ISM	InterStellar Medium
ISM	Intimate Shared Memory
ISN	Information Systems Network
ISN	Initial Sequence Number
ISN	Integrated Systems Network
ISN	Internal Sequence Number
ISN	Item Sequence Number
ISO	In Search Of
ISO	Incentive Stock Options
ISO	Independent Service Organizations
ISO	Independent System Operator
ISO	Infrared Space Observatory
ISO	Installation Security Officer
ISO	International Organization for Standardization [!]
ISP	In-System Programming
ISP	Individual Separation Package
ISP	Initial Systems Planning
ISP	Integrated Switching Panel
ISP	Interface Segregation Principle
ISP	International Standardized Profile
ISP	Internet Service Provider
ISP	Item Sequential Processing
ISP	[GGF] Information Systems and Performance
ISQ	Internet Software Quality [Group]
ISR	In Situ Rinse
ISR	In-Sync Replica
ISR	Independent Shifting Rod
ISR	Initial Spares Requirements
ISR	Initial Supplier Review
ISR	Institute of Snow Research
ISR	Intelligence, Surveillance, and Reconnaissance
ISR	Internal Service Request
ISR	Interrupt Service Routine
ISS	Imaging Science Subsystem
ISS	In Service Support
ISS	Industry Standard Server
ISS	Inertial Sensor System
ISS	Information Services Standard
ISS	Institutional Shareholder Services
ISS	Integrated Support Systems
ISS	Integrated Switching System
ISS	Intelligent Support Systems
ISS	Inter-Satellite Service
ISS	Internal Sublayer Service
ISS	International Space Station
ISS	Internet Security Systems [Corporation]
ISS	Ion Scattering Spectroscopy
ISS	Is Somebody Singing
IST	India Standard Time
IST	Information Services Technology
IST	Initial System Test
IST	International Systems Technology
IST	Interrupt Stack Table
IST	Intersight Service for [HashiCorp] Terraform [Service]
IST	Irish Summer Time
IST	Iteration Space Tiling
ISU	Illinois State University
ISU	Inboard Station Unit
ISU	Initial Signal Unit
ISU	Iowa State University
ISV	Independent Software Vendor
ISV	Instantaneous Speed Variation
ISW	Important Superficial Work
ISW	Insanely Suicidal Wrestling
ISW	Institute for the Study of War
ISY	International Space Year
ITA	Imperial Traders Association
ITA	Industrial Telecommunications Association
ITA	Intent To Adopt
ITA	[WTO] Information Technology Agreement
ITB	In The Back
ITB	[AXP] Instruction Translation Buffer
ITC	Independent Telephone Company
ITC	Independent Television Commission
ITC	Individual Training Cost
ITC	Integrated Test Concept
ITC	Inter-Task Communication
ITC	International Technology Corporation
ITC	International Training Center
ITC	Internet Trading Channel
ITC	Interval Time Counter
ITC	Investment Tax Credit
ITC	[USA] International Trade Commission
ITD	Information Technology Division
ITD	InterTropical Discontinuity
ITD	IOS Technologies Division
ITE	Integration Test Environment
ITE	Interactive TeX Editor
ITF	Intermittent Terminal Facility
ITI	Industrial Technology Institute
ITI	Information Technology Industry [Council]
ITI	Information Technology Innovation
ITI	Institute for Translators and Interpreters
ITL	Instructional Technology Lab
ITM	Information Technology Management
ITM	International Training Massage [School]
ITM	Interval Time Match
ITO	Indium-Tin Oxide
ITO	Information Technology Office
ITO	Innovation Time Off
ITO	Instrument TakeOff
ITO	Intent To Orphan
ITO	International Trade Organisation
ITP	Instructions To Proceed
ITP	Integrated Test Plan
ITP	Integrated Test Programme
ITP	Intent To Package
ITP	Interactive Translation Prediction
ITP	International Talent Programme
ITR	Income Tax Return
ITR	Information Technology Research [Initiative]
ITR	Inspection Test Record
ITR	Instantaneous Turn Rate
ITR	Institute for Temporal Research
ITR	Integrated Test Range
ITR	International Telecommunication Regulation
ITR	Internet TLA Registry
ITS	Incompatible Time-sharing System
ITS	Information Technology System
ITS	Institute of Telecommunication Science
ITS	Integrated Technology Services
ITS	Integrated Test System
ITS	Integrated Training System
ITS	Integrated Truss Structure
ITS	Intent To Sponsor
ITT	Independent Technical Tester
ITT	Integrated Test Team
ITT	Intent To Treat
ITT	Inter-Turbine Temperature
ITT	International Telephone and Telegraph
ITT	Interstage Turbine Temperature
ITT	Invitation To Tender
ITT	Invitation To Transmit
ITU	Intermodal Transport Unit
ITU	International Tariffed Utilities [Association]
ITU	International Telecommunications Union
ITU	Interplan Truckers' Union
ITV	Independent TeleVision
ITV	Integration Test Vehicle
ITV	Interactive TeleVision
ITW	International Travel Week
ITX	Information Technology eXtended
IUA	Internal User Admin
IUB	Indefinite Unemployment Benefits
IUC	Internationalization and Unicode Conference
IUD	Intra-Uterine Device
IUE	International Ultraviolet Explorer
IUF	International Unicycling Federation
IUK	Iterative Universal Kriging
IUM	Internet Usage Manager
IUP	Internal User Portal
IUR	Islamic University of Rotterdam
IUS	Inertial Upper Stage
IUS	Initial Unit Structure
IUS	Interim Upper Stage
IUT	Implementation Under Test
IUU	Illegal, Unreported, and Unregulated
IUV	Interlibrational Utility Vehicle
IVA	Interruption Vector Address
IVC	IKS Version Catalog
IVC	Irvine Valley College
IVD	In-Vitro Diagnostic
IVH	Interstitial Via Hole
IVI	In Vehicle Infotainment
IVI	Interchangeable Virtual Instrument
IVL	In Value List
IVL	Independent VLAN Learning
IVL	Intestinal Villi Lamination
IVM	Interactive Video Module
IVO	IBM Volume Option
IVP	Industry Value Proposition [Project]
IVP	Initial Value Problem
IVP	Installation Verification Program
IVP	Integrated Vacuum Processing
IVP	Invoice Validation Procedure
IVR	Interactive Voice Response
IVS	Instantaneous Vertical Speed
IVT	Installation Verification Test
IVV	Independent Verification and Validation
IWC	Inside Wire Cable
IWD	Intermediate Water Depth
IWD	International Women's Day
IWF	Internet Watch Foundation
IWF	InterWorking Function
IWG	Interface Work Group
IWI	Israel Weapon Industries
IWM	In-Wheel Motor
IWO	Internal Works Order
IWO	Intersight Workload Optimizer
IWR	In-house Work Request
IWR	Interdivisional Work Requisition
IWR	[Jane's] Intelligence Watch Report
IWS	Intelligent Work-Station
IWW	I Will Win
IWW	Industrial Workers of the World
IWW	Internet World Wireless
IXA	Internet eXchange Architecture
IXC	IntereXchange Carrier
IXM	IntereXchange Mileage
IXP	Internet eXchange network Processor
IXP	Internet eXchange Point
IXS	[IBM] Integrated XSeries Server
IYA	In Your Ass
IYA	International Young Aeronauts
IYA	International Young Art
IYA	International Youth Advocates
IYA	Irish Yoga Association
IYA	Iyengar Yoga Association
IYB	Implement Your Business
IYB	Improve Your Business
IYB	Independent Youth Benefit
IYB	Interior Youth Basketball
IYB	International Yacht Brokers
IYB	International Youth Ballet
IYB	International Youth Board
IYB	International Youth Brigade
IYB	It's Your Business
IYB	Ithaca Youth Bureau
IYC	Igbo Youth Congress
IYC	Ijaw Youth Congress
IYC	Ijaw Youth Council
IYC	Ikwerre Youth Convention
IYC	Illinois Youth Centers
IYC	Indian Youth Congress
IYC	Indian Youth Consortium
IYC	Indian Youth Council
IYC	Indianapolis Yacht Club
IYC	Indianapolis Youth Chorale
IYC	Infants & Young Children
IYC	Institute Yacht Clause
IYC	Integral Yoga Center
IYC	Intercity Yacht Club
IYC	Intercontinental Youth Camp
IYC	Interdenominational Youth Choir
IYC	Interdistrict Youth Cabinet
IYC	Intermountain Youth Centers
IYC	International Yacht Charter
IYC	International Yacht Club
IYC	International Yacht Collection
IYC	International Yacht Council
IYC	International Year of the Child
IYC	International Yield Curve
IYC	International Yoga Center
IYC	International Yonsei Club
IYC	International Youth Camp
IYC	International Youth Card
IYC	International Youth Center
IYC	International Youth Club
IYC	International Youth Committee
IYC	International Youth Conference
IYC	International Youth Convention
IYC	International Youth Convocation
IYC	International Youth Cup
IYC	International Youth for Christ
IYC	International Youth sports Challenge
IYC	Internet and Your Child
IYC	Inverness Yacht Club
IYC	Irish Youth Choir
IYC	Iroquois Yacht Club
IYC	Islamic Youth Centre
IYC	Islamic Youth Connection
IYC	Island Yacht Club
IYC	It's Your Choice
IYC	It's Your Company
IYC	Izon Youth Council
IYF	International Youth Foundation
IYI	If You're Interested
IYI	In Your Interest
IYI	Indiana Youth Institute
IYI	Integral Yoga Institute
IYI	Intellectual Yet Idiot
IYI	International Yoga Institute
IYI	International Youth Impact
IYI	International Youth Initiative
IYI	International Youth Internship
IYJ	In the Year of the Jubilee
IYL	Illuminate Your Learning
IZT	[DNS] Incremental Zone Transfer