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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

i3 Investing In Innovation
I&A Industry & Analysis (older link archive; archive2) | 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; older link archive) | Import Administration (changed to Enforcement and Compliance; older link archive) | Indian Affairs | Office of International Affairs (older link archive)
IAAF Interagency Accessibility Forum (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 Industry Analysis Division | Information Access Division | Information Assurance Directorate (changed to Cybersecurity; older link archive) | International Affairs Division (older link archive; archive2) | Investigative Analysis Division
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)
IAEM Institute for Advanced Electron Microscopy
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)
IALS International Adult Literacy Survey
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; archive2) | International Activities Program
IAPD Investment Adviser Public Disclosure (older link archive)
IAQ Indoor Air Quality
IARPA Intelligence Advanced Research Projects Activity
IARPC Interagency Arctic Research Policy Committee
IASA International Aviation Safety Assessment
IASAP Indian Alcohol and Substance Abuse Program (unable to verify 12/18)
IASOA International Arctic Systems for Observing the Atmosphere (older link archive)
IASP Integrated Aviation Systems Program
IAT Interagency Aviation Training
IATP Intelligence Analyst Training Program (unable to verify 8/18)
IAWG Interagency Working Group
IB International Bureau
IBAT Interagency Bolt Action Team
IBB International Broadcasting Bureau (changed to BBG)
IBC Interior Business Center
IBCE Institute of Bioenergy, Climate, and Environment (older link archive)
IBEX Interstellar Boundary Explorer
IBFS International Bureau Electronic Filing System
IBIA Interior Board of Indian Appeals
IBLA Interior Board of Land Appeals (older link archive)
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)
IBS International Banking Supervision
IBTrACS International Best Track Archive for Climate Stewardship
IBWC International Boundary and Water Commission
IBx Program Office for Innovation and Industrial Base Expansion
IC Intelligence Community
IC3 Internet Crime Complaint Center (older link archive)
ICAA International Conservation Chiefs Academy (older link archive)
ICAC Internet Crimes Against Children Task Force Program (unable to verify 10/19)
ICAM Identity, Credential, and Access Management
ICAMS Interagency Council for Advancing Meteorological Services
ICARS Interagency Council on Agricultural and Rural Statistics
ICASS International Cooperative Administrative Support Services (older link archive; archive2)
ICBEMP Interior Columbia Basin Ecosystem Management Project (archived site; older link archive)
ICC Interstate Commerce Commission | Office of Incident Command and Control (older link archive)
ICCE Office of International Climate and Clean Energy
ICCPUD Interagency Coordinating Committee on the Prevention of Underage Drinking (alternate link archive)
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 (older link archive)
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
ICILS International Computer and Information Literacy Study
ICIS Integrated Compliance Information System
ICITAP International Criminal Investigative Training Assistance Program
ICLUS Integrated Climate and Land-Use Scenarios (older link archive; archive2)
ICM Integrated Corridor Management
ICMOB Intramural Clinical Management and Operations Branch
ICOADS International Comprehensive Ocean-Atmosphere Data Set
ICON Ionospheric Connection Explorer
ICOR Immigration Court Online Resource
iCOUP Institute for the Cooperative Upcycling of Plastics
ICP Indian Children's Program (older link archive) | International Information and Communications Policy
ICPD Individual and Community Preparedness Division
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; archive2) | Industrial Control Systems | International Cyberspace Security
ICS-CERT Industrial Control Systems Cyber Emergency Response Team (merged into NCCIC)
ICSO Interior Complex Security Operations
ICSP Interagency Committee on Standards Policy (older link archive; archive2)
ICTIME Interagency Center for Trade Implementation, Monitoring, and Enforcement
ICTS Information and Communication Technology Survey
ICU Influenza Coordination Unit (unable to verify 2/16)
ID Influenza Division | Intelligence Division (older link archive)
IDA Individual Development Accounts (older link archive) | Interactive Data Analyzer
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
IDEA Individuals with Disabilities Education Act
IDEAS Interagency Disability Educational Awareness Showcase (unable to verify 8/13)
IDEP Integrated Diabetes Education Program (defunct)
IdHSC Identity History Summary Checks
IDPB Infectious Diseases Pathology Branch
IDSR Integrated Disease Surveillance and Response (older link archive)
IEA Office of Independent Enterprise Assessments (changed to EA) | Office of Intergovernmental and External Affairs
IECMHC Center of Excellence for Infant and Early Childhood Mental Health Consultation
IED Office of Indian Economic Development
iEdison Interagency Edison
IEED Office of Indian Energy and Economic Development (changed to IED; older link archive)
IEIP International Emerging Infections Program
IELS International Early Learning Study
IER Immigrant and Employee Rights Section
IERH International Emergency and Refugee Health (changed to ERRB)
IES Institute of Education Sciences | Investigative and Enforcement Services
IESC Indian Energy Service Center (older link archive)
IE&VT Industries, Education, and Vocational Training Division (unable to verify 8/17)
IFAC In-Field Address Canvassing
IFAP Information for Financial Aid Professionals (changed to Knowledge Center)
I-FAST Innovations in Food and Agricultural Science and Technology Prize Competition (unable to verify 3/21)
IFD Division for International Finance and Development
IFDP International Finance Discussion Papers (older link archive)
IFFC Illicit Finance Fusion Cell
IFLE International and Foreign Language Education
IFO International Field Offices
IFPS Institute of Food Production and Sustainability (older link archive; archive2; archive3)
IFSAC Interagency Food Safety Analytics Collaboration
IFSN Institute of Food Safety and Nutrition (older link archive; archive2)
IFU International Field Units (unable to verify 4/15)
IGA Office of Intergovernmental Affairs (older link archive; archive2)
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; archive2)
IGIM Interagency Group on Integrative Modeling
IGMS Integrated Grants Management System (older link archive)
IGNITE Implementing Genomics in Practice
IGP Office of Information Governance and Privacy (changed to OIGP; older link archive)
IGRA Integrated Global Radiosonde Archive (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)
IHCIF Indian Health Care Improvement Fund
IHEC Interdepartmental Health Equity Collaborative
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 (older link archive)
IIA Office of International and Integrative Activities (changed to OIA)
IIAD International and Interagency Affairs Division
IIB Infections and Immunoepidemiology Branch (older link archive)
IID Inactive Ingredient Database (older link archive)
IIF Injuries, Illnesses, and Fatalities
III Interstate Identification Index
IIM Individual Indian Money Accounts
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 | Immunization Information Systems
IISAR Immunization Information Systems Annual Report
IITF International Institute of Tropical Forestry
IJC International Joint Commission
ILA Independent Living Administration (unable to verify 4/20; older link archive)
ILAB Bureau of International Labor Affairs
ILC International Labor Comparisons
ILCP Indian Land Consolidation Program (older link archive)
ILD Intelligence Law Division
ILER Individual Longitudinal Exposure Record
ILGP Indian Loan Guarantee and Insurance Program
ILN Intelligence Learning Network (older link archive; archive2)
ILS Independent Living Services
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 (older link archive)
IMATS Inventory Management and Tracking System (unable to verify 1/20)
IMC Interagency Management Council for Federal Telecommunications (unable to verify 12/12)
IMCP Investing in Manufacturing Communities Partnership (unable to verify 4/20)
IMDCC Interagency Marine Debris Coordinating Committee (older link archive)
IME Institute of Molecular Engineering (unable to verify 9/17)
IMF International Monetary Fund
IMG/M Integrated Microbial Genomes & Microbiomes
IML Irradiated Materials Laboratory
IMLS Institute of Museum and Library Services
IMM Immigration Law Division
IMMPaCt International Micronutrient Malnutrition Prevention and Control Program (older link archive)
INADs Investigational New Animal Drugs
INB Integrative Neuroscience Branch (older link archive; archive2)
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; archive3)
INFRA Infrastructure for Rebuilding America (older link archive; archive2)
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 (older link archive)
INR Bureau of Intelligence and Research (older link archive; archive2)
INRMPs Integrated Natural Resources Management Plans
INS Immigration and Naturalization Service (changed to USCIS)
INT Office of International Affairs (DOI)
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
IOD International Operations Division
IOLP Inventory of Owned and Leased Properties (older link archive; archive2; archive3; archive4)
IOMs Internet Only Manuals (older link archive)
IOOS Integrated Ocean Observing System
IOS Division of Integrative Organismal Systems
IOSS Interagency OPSEC Support Staff | Investigative and Operations Support Section
IP Office of Infrastructure Protection (changed to ISD)
IPaC Information for Planning and Consultation (changed from Information, Planning, and Conservation; older link archive)
IPAD International and Philanthropic Affairs Division | International Production Assessment Division (older link archive)
IPAS Illicit Pathways Attack Strategy (older link archive)
IPAWS Integrated Public Alert & Warning System
IPCD Intermodal Passenger Connectivity Database (older link archive; archive2)
IPD Innovative Program Delivery (changed to CIFS) | International Programs Division
IPE Immunization Program Evaluation
IPEC Intellectual Property Enforcement Coordinator (unable to verify 2/21)
IPEDS Integrated Postsecondary Education Data System
IPEP Intellectual Property Theft Enforcement Program (older link archive)
IPI International and Philanthropic Innovation (changed to IPAD)
IPM Integrated Pest Management, FWS (unable to verify 2/16) | Integrated Pest Management, NIFA (older link archive)
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, NCDC
IPTF Intellectual Property Task Force (unable to verify / website archived 1/22)
IPTU International Prisoner Transfer Program (older link archive)
IPY International Polar Year
IQCP Individualized Quality Control Plan
IQIP Immunization Quality Improvement for Providers
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; archive2; archive3)
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)
IREPO Institutional Resilience and Expanded Postsecondary Opportunity program
IRG Intergovernmental Reference Guide
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 Intermediary Relending Program (older link archive) | Intramural Research Program
IRR Indian Reservation Roads (replaced by TTP; older link archive)
IRS Internal Revenue Service
IRS-CI Internal Revenue Service, Criminal Investigations (older link archive; archive2)
IRSOB IRS Oversight Board (unable to verify 4/22)
IRTM Division of Information Resources and Technology Management (older link archive)
IRWIN Integrated Reporting of Wildland-Fire Information
IS International Services
ISA Importer Self-Assessment (older link archive; archive2)
ISAs Integrated Science Assessments
ISAC Invasive Species Advisory Committee (inactive as of 2020)
ISAT Information Sharing Assessment Tool
ISB Investigative Services Branch
ISC Integrated Support Center (changed to CSC; older link archive) | Interagency Security Committee (older link archive)
ISC3 Implementation Science Centers in Cancer Control
ISCAP Interagency Security Classification Appeals Panel
ISCD Infrastructure Security Compliance Division (older link archive; archive2; archive3)
ISCR Institute for Scientific Computing Research (unable to verify 2/19)
ISD Immunization Services Division | Industry Safety Data | Information Services Division | Infrastructure Security Division (older link archive) | Integrated Surface Database (older link archive)
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
ISPO International Safeguards Project Office
ISSM Ice Sheet System Model
ISSMG Internet and Scalable Systems Metrology Group (older link archive)
I-STEP Intermodal Security Training and Exercise Program
ITA Interactive Tax Assistant (older link archive) | International Trade Administration
ITAP Federal Interagency Committee on Invasive Terrestrial Animals and Pathogens | International Technical Assistance Program
ITAR International Traffic in Arms Regulations
ITC International Tax Counsel | 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 (replaced by ICTIME)
ITF Innovation Task Force
ITIS Integrated Taxonomic Information System
ITL Information Technology Laboratory
ITPO Innovative Technology Partnerships Office (changed to SPO)
ITS Identity Theft Supplement (older link archive) | Institute for Telecommunications Sciences (older link archive) | Intelligent Transportation Systems | International Treasury Services
ITVERP International Terrorism Victim Expense Reimbursement Program (older link archive)
IV&V Katherine Johnson Independent Verification and Validation Facility
IVLP International Visitor Leadership Program
IWAAs Integrated Water Availability Assessments
IWCAL Integrated Water Chemistry Assessment Laboratory
IWG Interagency Working Group
IWG-OCM Interagency Working Group on Ocean and Coastal Mapping
IWGYP Interagency Working Group on Youth Programs
IWMS Irrigation and Water Management Survey
IWS Irregular Warfare Support Program (unable to verify; likely changed to CTTSO)
IWTSD Irregular Warfare Technical Support Directorate
IYFC Institute of Youth, Family, and Community (older link archive; archive2; archive3)
IYSC Indian Youth Service Corps Program