IACS (Industrial Automation and Control Systems)
IAEA (International Atomic Energy Agency)
IASB (International Accounting Standards Board)
IATA (International Air Transportation Association)
IAU (International Astronomical Union)
IBAN (International Bank Account Number)
ICA (International Compliance Association)
ICC (International Chamber of Commerce)
ICE (Intercontinental Exchange)
ICO (Information Commissioner's Office
ICRC (International Committee of the Red Cross)
ICS (Industrial Control System)
ICSID (International Centre for Settlement of Investment Disputes)
ICT (Information and Communication Technology)
Identification and Prioritisation
IEA (International Energy Agency)
IEC (International Electrotechnical Commission)
IED (Improvised Explosive Device)
IEEE (Institute of Electrical and Electronic Engineers)
IEF (International Energy Forum)
IET (Institution of Engineering and Technology)
IFA (Institute for Occupational Safety and Health of the German Social Accident Insurance)
IFC (International Finance Corporation)
IFRC (The International Federation of Red Cross and Red Crescent Societies)
IFRS (International Financial Reporting Standards)
IISD (International Institute for Sustainable Development)
ILO (International Labour Organization)
IMF (International Monetary Fund)
Immunisation (or Immunization)
IMO (International Maritime Organization)
Implicit Contingent Liability (or Implicit Indirect Liability)
Implicit Price Index (GDP Deflator)
Incident Investigation Management System
Incremental Product Innovation
Independent Overfill Protection System
Independent Power Producer (IPP)
Independent Private Institution
Independent Protection Layer (IPL)
Independent System Operator (ISO)
Individual Retirement Pension (IRP) Plan
Induction Period (or Time)
INE (Shanghai International Energy Exchange)
Infrared Thermography Testing (IRT)
INGAA (Interstate Natural Gas Association of America)
Inherent Moisture (or Bed Moisture)
Input-Process-Output (IPO) Model (or IPO Diagram)
Inrush Current (or Starting Current)
Inspection, Testing, and Preventive Maintenance (ITPM)
Installation Details for Lighting
Institute for Health and Consumer Protection (IHCP)
Institute for Human & Machine Cognition (IHMC)
Institute for Supply Management (ISM)
Institute of Historical Research (IHR)
Instrument and Control System Schematic
Instrument Data Sheet (Instrument Datasheet)
Instrument Design Data and Engineering Calculation
Instrument Junction Box Schedule
Instrument Junction Boxes and Panels Block Diagram
Instrument Power and Utility Requirement
Instrumented Protective System (IPS)
Integral Collector Storage System
Integrated Business Planning (IBP)
Integrated Gasification Combined Cycle (IGCC)
Integrated Resource Plan (IRP)
Intelligent Electronic Device (IED)
Intelligent P&ID (Piping & Instrumentation Diagram)
Inter Connection Drawing between Panels
Interaction to Next Paint (INP)
Intercontinental Exchange (ICE)
Interface Control Drawing (ICD)
Intergranular Stress Corrosion Cracking
Internal Combustion Electric Power Plant
Internal Ratings Based (IRB) Approach
International Bunker Industry Association (IBIA)
International Federation of Accountants (IFAC)
International Humanitarian Law
International Interbank Market
International Petroleum Exchange (IPE)
International Securities Identification Number (ISIN)
International Statistical Institute (ISI)
International Trade Organization (ITO)
Internet Protocol Suite (TCP/IP)
Intrusion Detection System (IDS)
IOC (International Oil Company)
IOC (International Olympic Committee)
IP (Intellectual Property) Address
IPC (International Patent Classification)
IPCC (Intergovernmental Panel on Climate Change)
IPM (Intelligent Power Management)
IR Drop (Current (I) passing through Resistance (R))
IRCA (International Register of Certificated Auditors)
IRENA (International Renewable Energy Agency)
IRM (Institute of Risk Management)
Irrevocable Letter of Credit (L/C)
ISA (International Society of Automation)
ISACA (Information Systems Audit and Control Association)
ISDS (Investor-State Dispute Settlement)
ISIN (International Securities Identification Numbers) Organization
Islamic Financial Services Board (IFSB)
ISO (International Organisation for Standardisation)
ISO 14000: Environmental Management
ISO 21500:2012 Guidance for Project Management
ISTQB (International Software Testing Qualifications Board)
ITP (Inspection and Test Plan)
ITU (International Telecommunication Union)
IUCN (International Union for Conservation of Nature)