| I&A | Identification & Authentication  
| Technology, Security |
| I&A | Office of Intelligence and Analysis
| Security |
| I/A | Interface Adapter
| Hardware, Technology |
| I/A | Internal Access
| Computer Programming |
| IA | I Agree
| Others |
| IA | I Answered
| Others |
| IA | I'm Awesome
| Others |
| IA | IAH And
| Others |
| IA | Identification Authentication
| Others |
| IA | Idiots Alike
| Others |
| IA | Ignore Append
| Others |
| IA | Im Allgemeinen ('Generally' in German)
| Others |
| IA | Im Auftrag
| Others |
| IA | Imagery Analyst
| Others |
| IA | Immediate Action
| Others |
| IA | Immediate Agreement
| Others |
| IA | Impact Aid
| Others |
| IA | ImpactAliyah
| Others |
| IA | Imperial Academy
| Others |
| IA | Imperial Army
| Others |
| IA | Impersonation Attack
| Others |
| IA | Implementation Agency
| Others |
| IA | Implementation Agreement
| Others |
| IA | Implementing Agency
| Others |
| IA | Implementing Agency (UNEP)
| Others |
| IA | Implementing Arrangement
| Others |
| IA | Import Administration
| Others |
| IA | Import Administration (United States Department of Commerce)
| Others |
| IA | Improbable or Absurd
| Others |
| IA | Improvisational Adaptation
| Others |
| IA | Impuesto al Activo
| Others |
| IA | Impulse Activity
| Others |
| IA | Impulse Approximation
| Others |
| IA | In Absence
| Others |
| IA | Inactive Brain
| Others |
| IA | Inborn Attributes
| Others |
| IA | Incredible and
| Others |
| IA | Incurred Accidentally
| Others |
| IA | Independent Agent
| Others |
| IA | Independent Appraiser
| Others |
| IA | Index Astartes
| Others |
| IA | Indian Airlines
| Others |
| IA | Indian American
| Others |
| IA | Indian Army
| Government, Military, Army, Defence |
| IA | Indiana Academy
| Others |
| IA | Individual Accountability
| Others |
| IA | Individual Achievement
| Others |
| IA | Individual Assignment
| Others |
| IA | Individual Assistance
| Others |
| IA | Individual Augmentee
| Military, Designation / Rank |
| IA | Industrial Accident
| Others |
| IA | Industrial Archaeology
| Others |
| IA | Industrial Art
| Others |
| IA | Industrial Arts Education
| Others |
| IA | Industrial Attachment
| Others |
| IA | Inequality Aversion
| Others |
| IA | Infinite Audio
| Others |
| IA | Inflammatory Arthritis
| Others |
| IA | Inflorescence Appearance
| Others |
| IA | Inflow Area
| Others |
| IA | Information Access
| Others |
| IA | Information Analyst
| Others |
| IA | Information Appliance
| Others |
| IA | Information Archaeologist
| Others |
| IA | Information Architect
| Others |
| IA | Information Architecture
| Others |
| IA | Information Assurance
| Others |
| IA | Informative Asset
| Others |
| IA | Initial Assessment
| Others |
| IA | Injured Active
| Others |
| IA | Innocent Angel
| Others |
| IA | Innovation Actions
| Others |
| IA | Innovative Audio
| Others |
| IA | Input Axis
| Others |
| IA | Insane Assassin
| Others |
| IA | Insane Assassins
| Others |
| IA | Insert Attribute
| Others |
| IA | Inshallah (If God wills)
| Others |
| IA | Insight to Action
| Others |
| IA | Inspection Authorization
| Others |
| IA | Inspector Aircraft
| Others |
| IA | Inspiration Academy
| Others |
| IA | InstallAnywhere
| Others |
| IA | Installation Aid
| Others |
| IA | Instant Access
| Others |
| IA | Instant Action
| Others |
| IA | Instant Answers
| Others |
| IA | Institute of Archaeology
| Others |
| IA | Instructional Assistant
| Others |
| IA | Instructor A
| Others |
| IA | Instructor Array
| Others |
| IA | Instrumental Attitudes
| Others |
| IA | Insufficient Address
| Others |
| IA | Intact America
| Others |
| IA | Integrated Aero
| Others |
| IA | Integrated Amplifier
| Others |
| IA | Integrated ANR
| Others |
| IA | Integrated Assault
| Others |
| IA | Integration Assembly
| Others |
| IA | Intel AMD (computer architecture)
| Others |
| IA | Intel Architecture
| Others |
| IA | Intelligence Amplification
| Others |
| IA | Intelligence Assessment
| Others |
| IA | Intelligence Assistant
| Others |
| IA | Intelligence Augmentation
| Others |
| IA | Intelligent Agent
| Others |
| IA | Intelligent Assistant
| Others |
| IA | Intelligent auto
| Others |
| IA | Intelligent Automata
| Others |
| IA | Intelligent Automation
| Others |
| ia | inter alia
| Others |
| IA | Interconnection Agreement
| Others |
| IA | Interest Age
| Others |
| IA | Interface Agent
| Others |
| IA | Interim Assistance
| Others |
| ia | Interlingua
| Others |
| IA | Intermediate Algebra
| Others |
| IA | Internal Affairs
| Others |
| IA | Internal Allocation
| Others |
| IA | Internal Anguish
| Others |
| IA | Internal Assessment
| Others |
| IA | Internal Audit
| Others |
| IA | International Academy
| Others |
| IA | International Affairs
| Others |
| IA | International Airport
| Others |
| IA | International Alliance
| Others |
| IA | International Alphabet
| Others |
| IA | International Artists
| Others |
| IA | International Auctioneers
| Others |
| IA | Internet Access
| Others |
| IA | Internet Appliance
| Others |
| IA | Internet Archaeology
| Others |
| IA | Internet Archive
| Others |
| IA | Internet Audio
| Others |
| IA | Interview Assistant
| Others |
| IA | Intra Arterial
| Others |
| IA | Intra-Arterial
| Others |
| IA | Inuit Ataqatigiit
| Others |
| IA | Invalid Argument
| Others |
| IA | Inverter Assembly
| Others |
| IA | Ione Association
| Others |
| IA | Iowa
| State |
| IA | Iraqi Airways
| Others |
| IA | Iraqi Army
| Others |
| IA | Irrigation and Aspiration
| Others |
| IA | Irwin Allen
| Others |
| IA | Isothermal Annealer
| Others |
| IA | Issac Anderson, Judge
| Others |
| IA | Issuing Agency
| Others |
| IA | Issuing Authority
| Others |
| IA | Iterative Algorithm
| Others |
| IA | Iterative Analysis
| Others |