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GovSpeak: A Guide to U.S. Government Acronyms & Abbreviations: I

The most current, extensive and fully-linked listing of U.S. government agency, office, program and publication acronyms.

I

I&A Industry & Analysis | Office of Intelligence and Analysis
I&M Biological Inventory and Monitoring (changed to ECO) | Inventory and Monitoring (older link archive)
I&O Industry and Occupation (older link archive)
IA International Affairs (changed to International Operations) | Import Administration (changed to E&C) | Indian Affairs |
Office of International Affairs (older link archive)
IAAO International and Academic Affairs Office
IAB InterAgency Board
IABC International Analysis and Banking Condition Division (unable to verify 10/19)
IAC Inventors Assistance Center
IACB Indian Arts and Crafts Board
IACC Interagency Autism Coordinating Committee
IACT Institute for Atom-Efficient Chemical Transformations (unable to verify 6/19; older link archive)
IAD Information Assurance Directorate (changed to Cybersecurity) | International Affairs Division (older link archive)
IADRP International Alzheimer's and Related Dementias Research Portfolio (older link archive)
IADRWG Interagency Alternative Dispute Resolution Working Group
IAE Integrated Award Environment (older link archive)
IAEGC Inter-Agency Electronic Grants Committee (changed to grants.gov)
IAF Inter-American Foundation
IAG Industries at a Glance
IAIP Infrastructure Analysis and Infrastructure Protection Program (unable to verify 1/08)
IAL Innovative Approaches to Literacy (older link archive)
IAM Indian Affairs Manual (older link archive)
IAO Interagency Office of the Research and Development Partnerships Group
IAP Medicaid Innovation Accelerator Program (older link archive) | International Activities Program
IAPD Investment Adviser Public Disclosure
IAQ Indoor Air Quality
IARPA Intelligence Advanced Research Projects Activity
IASAP Indian Alcohol and Substance Abuse Program (unable to verify 12/18)
IASOA International Arctic Systems for Observing the Atmosphere
IASP Integrated Aviation Systems Program
IAT Interagency Aviation Training
IATP Intelligence Analyst Training Program (unable to verify 8/18)
IAWG Interagency Working Group
IBB International Broadcasting Bureau (changed to BBG)
IBC Interior Business Center
IBCE Institute of Bioenergy, Climate, and Environment
IBEX Interstellar Boundary Explorer
IBIA Interior Board of Indian Appeals
IBLA Interior Board of Land Appeals
IBMP Interagency Bison Management Plan
IBP International Buyer Program
IBRC Innovative Bridge Research and Construction Program (unable to verify 1/15)
IBRD Innovative Bridge Research and Deployment Program (unable to verify 1/15) | International Bank for Reconstruction and Development
IBWC International Boundary and Water Commission
IC Intelligence Community
IC3 Internet Crime Complaint Center
ICAC Internet Crimes Against Children Task Force Program (unable to verify 10/19)
ICAM Identity, Credential, and Access Management
ICARS Interagency Council on Agricultural and Rural Statistics
ICASS International Cooperative Administrative Support Services (older link archive)
ICBEMP Interior Columbia Basin Ecosystem Management Project (archived site; older link archive)
ICC Interstate Commerce Commission
ICCE Office of International Climate and Clean Energy
ICCPUD Interagency Coordinating Committee on the Prevention of Underage Drinking
ICCVAM Interagency Coordinating Committee on the Validation of Alternative Methods (older link archive)
ICD Interagency Contract Directory | International Classification of Diseases (older link archive)
ICDBG Indian Community Development Block Grant (older link archive)
ICDR Interagency Committee on Disability Research
ICE Immigration and Customs Enforcement
ICEIWG Indian Country Energy and Infrastructure Working Group
ICESat-2 Ice, Cloud, and Land Elevation Satellite-2
ICF Office of Inertial Confinement Fusion (unable to verify 8/18)
ICH Interagency Council on Homelessness
ICIS Integrated Compliance Information System
ICITAP International Criminal Investigative Training Assistance Program
ICLUS Integrated Climate and Land-Use Scenarios (older link archive)
ICM Integrated Corridor Management
ICMOB Intramural Clinical Management and Operations Branch
ICOADS International Comprehensive Ocean-Atmosphere Data Set
ICON Ionospheric Connection Explorer
ICP Indian Children's Program (older link archive)
ICPO International Cooperative Programs Office
ICPPS Interagency Council on Printing and Publications Services (replaced by FPC; older link archive)
ICS Incident Command System (older link archive)
ICS-CERT Industrial Control Systems Cyber Emergency Response Team (older link archive)
ICSO Interior Complex Security Operations
ICSP Interagency Committee on Standards Policy (older link archive)
ICTS Information and Communication Technology Survey
ICU Influenza Coordination Unit (unable to verify 2/16)
ID Influenza Division | Intelligence Division (older link archive)
IDA International Development Association
IDB International Data Base (older link archive) | Investigational Drug Branch
IDD Infrastructure Protection and Disaster Management Division (unable to verify 5/14)
IDDB Intellectual and Developmental Disabilities Branch
IDE International Data Explorer
IDEAS Interagency Disability Educational Awareness Showcase (unable to verify 8/13)
IDEP Integrated Diabetes Education Program (defunct)
IDPB Infectious Diseases Pathology Branch
IDSR Integrated Disease Surveillance and Response (older link archive)
IEA Office of Independent Enterprise Assessments (changed to EA)
IECMHC Center of Excellence for Infant and Early Childhood Mental Health Consultation
IEED Office of Indian Energy and Economic Development (older link archive)
IER Immigrant and Employee Rights Section
IERH International Emergency and Refugee Health (changed to ERRB)
IES Institute of Education Sciences
IE&VT Industries, Education, and Vocational Training Division (unable to verify 8/17)
IFAP Information for Financial Aid Professionals
I-FAST Innovations in Food and Agricultural Science and Technology Prize Competition
IFD Division for International Finance and Development
IFDP International Finance Discussion Papers (older link archive)
IFLE International and Foreign Language Education
IFO International Field Offices
IFPS Institute of Food Production and Sustainability
IFSN Institute of Food Safety and Nutrition
IFU International Field Units
IGA Office of Intergovernmental Affairs (defunct or inactive 1/17, WH transition)
IGBST Interagency Grizzly Bear Study Team
IGEMS Interior Geospatial Emergency Management System (unable to verify 2/18)
IGIA Interagency Group on Insular Areas (older link archive)
IGIM Interagency Group on Integrative Modeling
IGMS Integrated Grants Management System
IGP Office of Information Governance and Privacy (older link archive)
IGSB Institute for Genomics & Systems Biology (unable to verify 4/19)
IHA Indian Housing Authority (changed to PIH)
IHB Office of International Health and Biodefense
IHBG Indian Housing Block Grant (older link archive)
IHM Images from the History of Medicine (older link archive) | Indian Health Manual
IHPES Indian Health Performance Evaluation System
IHS Indian Health Service
IHSC Immigration and Customs Enforcement Health Service Corps
IIA Office of International and Integrative Activities (changed to OIA)
IIAD International and Interagency Affairs Division
IIB Infections and Immunoepidemiology Branch
IID Inactive Ingredient Database (older link archive)
IIF Injuries, Illnesses, and Fatalities
IIOG Interagency Interoperability Oversight Group (unable to verify)
IIP Bureau of International Information Programs (unable to verify 6/19; older link archive) | Division of Industrial Innovation and Partnerships
IIS Division of Information & Intelligent Systems
IITF International Institute of Tropical Forestry
ILA Independent Living Administration (older link archive)
ILAB Bureau of International Labor Affairs
ILC International Labor Comparisons
ILCP Indian Land Consolidation Program (older link archive)
ILN Intelligence Learning Network (older link archive)
ILO International Labour Organization
iLSA Institute for Laser Science Applications (changed to CHEDS)
IM Division of Investment Management (older link archive)
IMAGE ICE Mutual Agreement between Government and Employers
IMATS Inventory Management and Tracking System
IMC Interagency Management Council for Federal Telecommunications (unable to verify 12/12)
IMCP Investing in Manufacturing Communities Partnership
IMDCC Interagency Marine Debris Coordinating Committee
IME Institute of Molecular Engineering (unable to verify 9/17)
IMF International Monetary Fund
IMG/M Integrated Microbial Genomes & Microbiomes
IMLS Institute of Museum and Library Services
IMMPaCt International Micronutrient Malnutrition Prevention and Control Program
INB Integrative Neuroscience Branch (older link archive)
InCA Interactive Cancer Atlas (unable to verify 8/18; likely changed to USCS Data Visualizations)
INCA Interagency National Climate Assessment Working Group (unable to verify 2/18)
InciWeb Incident Information System
INCSR International Narcotics Control Strategy Report (older link archive; archive2)
IND Investigational New Drug (older link archive)
INEAP Interagency Network of Enterprise Assistance Providers (unable to verify 9/16)
INF Intermediate Range Nuclear Forces (older link archive; archive2)
INFRA Infrastructure for Rebuilding America
INL Bureau for International Narcotics and Law Enforcement Affairs (older link archive) | Idaho National Laboratory
INL/AME Office of Africa and Middle East Programs (unable to verify 6/19)
InPort NMFS Information Portal
INR Bureau of Intelligence and Research (older link archive)
INS Immigration and Naturalization Service (changed to USCIS)
INTERPOL International Criminal Police Organization
IO Bureau of International Organization Affairs (older link archive)
IOC/AG Information Operations Center’s Analysis Group (unable to verify 2/17)
IOCM Integrated Ocean and Coastal Mapping
IOLP Inventory of Owned and Leased Properties (older link archive; archive2; archive3)
IOMs Internet Only Manuals
IOOS Integrated Ocean Observing System
IOS Division of Integrative Organismal Systems
IOSS Interagency OPSEC Support Staff | Investigative and Operations Support Section
IP Intellectual Property Enforcement Program | Office of Infrastructure Protection (changed to ISD)
IPaC Information, Planning, and Conservation
IPAD International Production Assessment Division (older link archive)
IPAS Illicit Pathways Attack Strategy
IPCD Intermodal Passenger Connectivity Database (older link archive)
IPD Innovative Program Delivery (changed to CIFS) | International Programs Division
IPI International and Philanthropic Innovation
IPM Integrated Pest Management, FWS (unable to verify 2/16) | Integrated Pest Management, NIFA
IPP Import Permit Program (older link archive) | Innovative Partnerships Program (changed to ITPO) | Invoice Processing Platform
IPR Center National Intellectual Property Rights Coordination Center
IPRL Invasive Plant Research Laboratory (older link archive)
IPRP Interagency Pain Research Portfolio
IPS Images and Publications System, NCEI
IPTF Intellectual Property Task Force
IPTU International Prisoner Transfer Program (older link archive)
IPY International Polar Year
IRA Industry and Regional Analysis Division (unable to verify 10/19)
IRAC Interdepartment Radio Advisory Committee
IRAP International Research and Applications Project (older link archive)
IRAT Inorganic and Radiation Analytical Toxicology Branch
IRB Internal Revenue Bulletin (older link archive)
IRDA Informatics Research and Development Activity (unable to verify 6/14; likely replaced by DHIS)
IRIS Immigration Records and Identity Services Directorate | Industrial Research and Development Information System (unable to verify 11/18; see archive) | Integrated Risk Information System | Interface Region Imaging Spectrograph
IRM Bureau of Information Resource Management (older link archive) | Internal Revenue Manual
IRMA Integrated Resource Management Applications
IRMCO Interagency Resources Management Conference (unable to verify 3/13)
IRP Intramural Research Program
IRR Indian Reservation Roads (older link archive)
IRS Internal Revenue Service
IRS-CI Internal Revenue Service, Criminal Investigations (older link archive)
IRSOB IRS Oversight Board
IRTM Division of Information Resources and Technology Management
IRWIN Integrated Reporting of Wildland-Fire Information
IS International Services
ISA Importer Self-Assessment (older link archive)
ISAs Integrated Science Assessments
ISAC Invasive Species Advisory Committee
ISB Investigative Services Branch
ISC Integrated Support Center (older link archive) | Interagency Security Committee
ISCAP Interagency Security Classification Appeals Panel
ISCD Infrastructure Security Compliance Division (older link archive)
ISCR Institute for Scientific Computing Research (unable to verify 2/19)
ISD Immunization Services Division | Information Services Division | Infrastructure Security Division | Integrated Surface Database
ISDC Interagency Suspension and Debarment Committee
ISE Information Sharing Environment (older link archive)
ISIS Integrated Software for Imagers and Spectrometers
ISLSWG International Space Life Sciences Working Group
ISMICC Interdepartmental Serious Mental Illness Coordinating Committee
ISN Bureau of International Security and Nonproliferation (older link archive)
ISN/ECC Office of Export Control Cooperation (also, ECC)
ISN/MNSA Office of Multilateral Nuclear and Security Affairs (also, MNSA)
ISO Immunization Safety Office (older link archive) | Office of International Security Operations (unable to verify 6/19)
ISOO Information Security Oversight Office
ISP International Statistics Program
ISSM Ice Sheet System Model
ITA Interactive Tax Assistant (older link archive) | International Trade Administration
ITAP Federal Interagency Committee on Invasive Terrestrial Animals and Pathogens | International Technical Assistance Program
ITC International Technical Cooperation | NRCS Information Technology Center | United States International Trade Commission
ITD International Trade Division (changed to IAD)
ITDS International Trade Data Systems
ITEC Interagency Trade Enforcement Center
ITIS Integrated Taxonomic Information System
ITL Information Technology Laboratory
ITPO Innovative Technology Partnerships Office (changed to SPO)
ITS Institute for Telecommunications Sciences | Intelligent Transportation Systems | International Treasury Services
ITVERP International Terrorism Victim Expense Reimbursement Program
IV&V Independent Verification and Validation Facility
IVLP International Visitor Leadership Program
IWG Interagency Working Group
IWGYP Interagency Working Group on Youth Programs
IWS Irregular Warfare Support Program (unable to verify; likely changed to CTTSO)
IYFC Institute of Youth, Family, and Community