| I AND C | Instrumentation And Control | - | Computer Acronyms(common) |
| I&C | Instrumentation And Control | - | Computer Acronyms(common) |
| I-TE | International Toxicity Equiv. | - | Computer Acronyms(common) |
| I-TEF | International Toxicity Equvalency Factor | - | Computer Acronyms(common) |
| I-TEQ | International Toxic Equivalent | - | Computer Acronyms(common) |
| IA | Impulse Approximation | - | Computer Acronyms(common) |
| IA/PA | Intermediate Alky./partial Alky. | - | Computer Acronyms(common) |
| IAA | Indole-3-acetic Acid | - | Computer Acronyms(common) |
| IAAD | Ion Assisted Arc Deposition | - | Computer Acronyms(common) |
| IAB | Information Access Branch | - | Computer Acronyms(common) |
| IABO | International Association Of Biological Oceanography (ICSU) | - | Computer Acronyms(common) |
| IAC | Impregnated Activated Carbon | - | Computer Acronyms(common) |
| IAC | Immunoaffinity Chromatography | - | Computer Acronyms(common) |
| IACE | Immunoaffinity Capillary Electrophoresis | - | Computer Acronyms(common) |
| IACG | Inter-Agency Consultative Group | - | Computer Acronyms(common) |
| IACIS | International Association Of Colloid And Interface Scientists | - | Computer Acronyms(common) |
| IACP | Integrated Air Cancer Project | - | Computer Acronyms(common) |
| IACS | International Annealed Copper Standard | - | Computer Acronyms(common) |
| IACUC | Institutional Animal Care And Use Committeepar | - | Computer Acronyms(common) |
| IAD | Ion Assisted Deposition | - | Computer Acronyms(common) |
| IADN | Integrated Atmospheric Deposition Network | - | Computer Acronyms(common) |
| IAE | Immunoaffinity Extraction | - | Computer Acronyms(common) |
| IAEA | International Atomic Energy Agency | - | Computer Acronyms(common) |
| IAEG | International Association Of Engineering Geology | - | Computer Acronyms(common) |
| IAEH | International Association For Environmental Hydrology | - | Computer Acronyms(common) |
| IAES | Ion Excited Auger Electron Spectroscopy | - | Computer Acronyms(common) |
| IAETL | International Association Of Environmental Testing Laboratories | - | Computer Acronyms(common) |
| IAG | International Association Of Geodesy | - | Computer Acronyms(common) |
| IAG | Island-arc Granitoids | - | Computer Acronyms(common) |
| IAGA | International Association Of Geomagnetism And Aeronomy | - | Computer Acronyms(common) |
| IAGC | International Association Of Geochemistry And Cosmochemistry | - | Computer Acronyms(common) |
| IAH | International Association Hydrogeologists | - | Computer Acronyms(common) |
| IAHE | International Association For Hydrogen Energy | - | Computer Acronyms(common) |
| IAHR | International Association For Hydraulic Research | - | Computer Acronyms(common) |
| IAHS | International Association Hydrological Sciences | - | Computer Acronyms(common) |
| IALLW-CAT | Isotope Area Liquid Low-level Waste Collection And Transfer | - | Computer Acronyms(common) |
| IAM | Immobilized Artificial Membrane | - | Computer Acronyms(common) |
| IAM | Independent Atom Model | - | Computer Acronyms(common) |
| IAM | Integrated Assessment Modeling | - | Computer Acronyms(common) |
| IAM | Internal Axis Method (in Calcns. Of Rotational Excitation In Atom-mol. Collisions) | - | Computer Acronyms(common) |
| IAMAP | International Association Of Meteorology And Atmospheric Physics (ICSU) | - | Computer Acronyms(common) |
| IAMAS | International Association Of Meteorological And Atmospheric Sciences | - | Computer Acronyms(common) |
| IAP | Intermittent Aeration Process (for Waste Treatment) | - | Computer Acronyms(common) |
| IAP | Imaging Atom Probe | - | Computer Acronyms(common) |
| IAP | Immunosuppressive Acidic Protein | - | Computer Acronyms(common) |
| IAP | Indoor Air Pollution | - | Computer Acronyms(common) |
| IAP | Inhibitor Of Apoptosis | - | Computer Acronyms(common) |
| IAP | Integrin-assocd. Protein | - | Computer Acronyms(common) |
| IAP | Intracisternal A-particle | - | Computer Acronyms(common) |
| IAP | Ion Activity Products | - | Computer Acronyms(common) |
| IAP | Islet-activating Protein | - | Computer Acronyms(common) |
| IAPA | Independent Asymptotic Pair Approxn. (in Electronic Structure) | - | Computer Acronyms(common) |
| IAPPS | International Association For The Plant Protection Sciences | - | Computer Acronyms(common) |
| IAPSO | International Association For The Physical Sciences Of The Ocean (ICSU) | - | Computer Acronyms(common) |
| IAQ | Indoor Air Quality | - | Computer Acronyms(common) |
| IAQINFO | Indoor Air Quality Information Clearinghouse | - | Computer Acronyms(common) |
| IAQMP | Indoor Air Quality Management Program | - | Computer Acronyms(common) |
| IAQP | Indoor Air Quality Program | - | Computer Acronyms(common) |
| IARC | International Agency For Research On Cancer | - | Computer Acronyms(common) |
| IAS | In-situ Air Sparging | - | Computer Acronyms(common) |
| IAS | Inelastic Atom Scattering | - | Computer Acronyms(common) |
| IAS | Isobaric Analog States | - | Computer Acronyms(common) |
| IASAP | International Arctic Seas Assessment Project | - | Computer Acronyms(common) |
| IASC | International Arctic Science Committee | - | Computer Acronyms(common) |
| IASCC | Irradiation-assisted Stress-corrosion Cracking | - | Computer Acronyms(common) |
| IASH | International Association On The Stability And Handling Of Liquid Fuels | - | Computer Acronyms(common) |
| IASI | Infrared Atmospheric Sounding Interferometer | - | Computer Acronyms(common) |
| IASPEI | International Association Of Seismology And Physics Of The Earth's Interior | - | Computer Acronyms(common) |
| IAST | Ideal Adsorbed Soln. Theory | - | Computer Acronyms(common) |
| IAT | Island Arc Tholeiite | - | Computer Acronyms(common) |
| IATA | International Air Transport Association (Geneva | - | Computer Acronyms(common) |
| IAVCEI | International Association Of Volcanology And Chemistry Of The Earth's Interior | - | Computer Acronyms(common) |
| IAVI | International AIDS Vaccine Initiative | - | Computer Acronyms(common) |
| IAWPRC | International Association For Water Pollution Research And Control | - | Computer Acronyms(common) |
| IAWQ | International Association On Water Quality | - | Computer Acronyms(common) |
| IBA | Ion Beam Analysis | - | Computer Acronyms(common) |
| IBAC | Immobilized Biomembrane Affinity Chromatography | - | Computer Acronyms(common) |
| IBAD | Ion-Beam-Assisted Deposition | - | Computer Acronyms(common) |
| IBAE | Ion Beam Assisted Etching | - | Computer Acronyms(common) |
| IBARE | Ion Beam Assisted Radical Etching | - | Computer Acronyms(common) |
| IBD | Inflammatory Bowel Diseases | - | Computer Acronyms(common) |
| IBD | Ion Beam Deposition | - | Computer Acronyms(common) |
| IBI | Index Of Biotic Integritypar | - | Computer Acronyms(common) |
| IBIC | Ion Beam Induced Charge | - | Computer Acronyms(common) |
| IBICC | Ion Beam Induced Charge Collection | - | Computer Acronyms(common) |
| IBICVD | Ion Beam Induced Chemical Vapor Deposition | - | Computer Acronyms(common) |
| IBIL | Ion Beam Induced Luminescence | - | Computer Acronyms(common) |
| IBM | International Business Machines | - | Computer Acronyms(common) |
| IBMK | Isobutyl Methyl Ketone | - | Computer Acronyms(common) |
| IBMS | Ion Beam Mass Spectrometry | - | Computer Acronyms(common) |
| IBR | In-plane Birefringence | - | Computer Acronyms(common) |
| IBR | Infectious Bovine Rhinotracheitis | - | Computer Acronyms(common) |
| IBS | Incomplete Basis Set | - | Computer Acronyms(common) |
| IBS | Ion Backscattering Spectroscopy | - | Computer Acronyms(common) |
| IBS | Ion Beam Sputtering | - | Computer Acronyms(common) |
| IBS | Irritable Bowel Syndrome | - | Computer Acronyms(common) |
| IBSCA | Ion Beam Spectrochemical Analysis | - | Computer Acronyms(common) |
| IBV | Infectious Bronchitis Virus | - | Computer Acronyms(common) |
| IC | Integrated Circuit | - | Computer Acronyms(common) |
| IC | Ion Chromatography | - | Computer Acronyms(common) |