| IF | Integration Facility | In English | → Engineering, technology |
| IF/FDM | Intermediate Frequency/Frequency Division Multiplexer | In English | → Telecommunications |
| IFA | In-Flight Analysis | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFA | Interuniversitäres Forschungsinstitut für Agrarbiotechnologie | In English | → Biotechnology → Agricultural sciences |
| IFAD | Internacia Fonduso de Agrikultura Disvolvado = FIDA | Fondul Internaţional pentru Dezvoltare Agricolă | In Romanian |
In Esperanto | → International relations → Agricultural sciences |
| IFAD | International Fund for Agricultural Development (www.ifad.org) = FIDA | Fondo Internacional de Desarrollo Agrícola | In Spanish = FIDA | Fonds International de Développement Agricole | In French = FIDA | Fundo Internacional de Desenvolvimento Agrícola | In Portuguese |
In English | → United Nations → Finance → Agricultural sciences |
| IFC | Istituto di Fisiologia Clinica | In Italian | → Physiology |
| IFD | Industrieel, Flexibel en Demontabel (Bouwen) | In Dutch | → Building |
| IFE | Industrial Furnished Equipment | In English | → Engineering, technology |
| IFEF | Internacia Fervojista Esperanto Federacio | In Esperanto | → Organizations and associations → Rail transport engineering → Transport and postal services |
| IFEU | Institut für Energie und Umweltforschung | In German | → Energy economics |
| IFFI | Institut Français du Froid Industriel et du génie climatique | In French | → Energy economics → Environmental technology, water supply, waste management |
| IFFN | Identification, Friend, Foe, Neutral | In English | → Military engineering |
| IFIC | International Food Information Council | In English | → Organizations and associations → Nutrition → Food technology |
| IFIN-HH | Institutul Naţional de Cercetare-Dezvoltare pentru Fizică şi Inginerie Nucleară 'Horia Hulubei' | In Romanian | → Nuclear, atomic, and molecular physics → Nuclear technology |
| IFKF | International Federation of Kidney Foundations | In English | → Organizations and associations → Medicine |
| IFM | In-Flight Maintenance | In English | → Maintenance and logistics → Spaceflight engineering, astronautics → Spaceflight engineering, astronautics |
| IFM | Integrated Flood Management | In English | → Natural disasters → 627 |
| IFM | Internationales Forum Mechatronik | In German | → Mechanical engineering → Electronics |
| IFMA | Institut Français de Mécanique Avancée | In French | → Mechanical engineering |
| IFOAM | International Federation of Organic Agriculture Movements | In English | → Organizations and associations → Agricultural sciences |
| IFOP | Instrument Financier d'Orientation de la Pêche = FIAF | Finanzinstrument für die Ausrichtung der Fischerei | In German = SFOP | Strumento Finanziario di Orientamento della Pesca | In Italian = FIFG | Financial Instrument for Fisheries Guidance | In English = FFU | Fonden för Fiskets Utveckling | In Swedish |
In French | → Finance → European Union → Fishing, hunting |
| IFOT | In-Flight Operations and Training | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFP | Institut Français du Pétrole | In French | → Research institutes → Earth sciences → Mining → 665 |
| IFPMA | International Federation of Pharmaceutical Manufacturers & Associations (www.ifpma.org) | In English | → Organizations and associations → Pharmacology, toxicology |
| IFR | Instrument Flight Rule | In English | → Aeronautics, aircraft |
| IFR | Institute of Food Research | In English | → Research institutes → Agricultural sciences → Food technology |
| IFRA | INCA-FIEJ Research Association | In English | → Associations → Newspapers, journalism → Graphic industries, printing, publishing |
| IFRE | Internacia Forstista Rondo Esperantlingva | In Esperanto | → Organizations and associations → Agricultural sciences |
| IFRS | International Financial Reporting Standards = МСФО | Международные стандарты финансовой отчётности | In Russian = IFRS | 国际财务报告准则 | In Chinese = NIIF | Normas Internacionales de Información Financiera | In Spanish = ΔΠΧΠ | Διεθνή Πρότυπα Χρηματοοικονομικής Πληροφόρησης | In Greek |
In English | → Accounting |
| IFRS | 国际财务报告准则 = МСФО, NIIF, ΔΠΧΠ (look above) |
In Chinese | → Accounting |
| IFRU | In-Flight Replaceable Unit | In English | → Aeronautics, aircraft |
| IFS | Integrated Flight Simulator | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFT | In-Flight Test | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFT | Institut Facultaire de Technologie | In French | → Specialized or (poly)technical colleges → Engineering, technology |
| IFT | Institutul Naţional de Cercetare-Dezvoltare pentru Fizică Tehnică | In Romanian | → Physics → Mechanical engineering |
| IFT | Institute of Food Technologists | In English | → Research institutes → Food technology |
| IFTH | Institut Français du Textile et de l'Habillement | In French | → Textile industry |
| IFTM | In-Flight Test and Maintenance | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFTS | In-Flight Test System | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IFTSTP | Institut de Formation des Techniciens Spécialisés des Travaux Publics | In French | → Specialized or (poly)technical colleges → Civil engineering → Civil engineering and land transport |
| IFZh | Инженерно-физический журнал = IFZh | Inzhenerno-Fizicheskii Zhurnal | In Russian |
In Russian | → Serial publications, periodicals → Mechanical engineering → Thermodynamics |
| IFZh | Inzhenerno-Fizicheskii Zhurnal = (look above) |
In Russian | → Serial publications, periodicals → Mechanical engineering → Thermodynamics |
| IG | Inertial Guidance | In English | → Vehicle engineering |
| IG | Índice glicêmico = GI | Glycemic Index | In English = GI | Glykemický index | In Czech = GI | Glykæmisk indeks | In Danish = GI | Glykämischer Index | In German = GI | Glükeemiline indeks | In Estonian = GI | Glykeeminen indeksi | In Finnish = ГИ | Гликемијски индекс | In Serbian = GI | Glisemik indeks | In Turkish |
In Portuguese | → Nutrition → Food technology |
| IGBT | Insulated Gate Bipolar Transistor | In English | → Electronics |
| IGDS | Iodine Generating and Dispensing System | In English | → Chemical technology |
| IGF | Industrielle Gemeinschaftsforschung | In German | → Research policy → Engineering, technology |
| IGF | Internet Governance Forum | In English | → Telecommunications |
| IGM | Iterative Guidance Mode | In English | → Vehicle engineering |
| IGM | Interactive Guidance Mode | In English | → Vehicle engineering |
| IGMHB | Institut de Génie Mécanique - Université des Sciences et de la Technologie Haouari Boumediene | In French | → Higher education, universities → Mechanical engineering |
| IGMP | Internet Group Management Protocol | In English | → Networks, communication → Telecommunications |
| IGOR | Institut für Gewebe- und Organrekonstruktion (www.igor.at) | In German | → Research institutes → Biotechnology → Medicine |
| IGOST | Interdisziplinäre Gesellschaft für Orthopädische Schmerztherapie | In German | → Organizations and associations → Surgery, orthopaedics, ophthalmology |
| IGR | Institut Gustave-Roussy | In French | → Oncology |
| IGS | Ingénieurs-Géomètres Suisses = IGS | Ingenieur-Geometer Schweiz | In German |
In French | → Organizations and associations |
| IGS | Ingenieur-Geometer Schweiz = (look above) |
In German | → Organizations and associations |
| IGS | Inertial Guidance System | In English | → Vehicle engineering |
| IGSE | In-Space Ground Support Equipment | In English | → Spaceflight engineering, astronautics |
| IGU | International Gas Union | In English | → Organizations and associations → Energy economics |
| IGV | Institut für Getreideverarbeitung | In German | → Agricultural sciences |
| IHERv | Ishikawajima Harima Engineering Review | In English | → Serial publications, periodicals → Engineering, technology |
| IHEST | Institut des Hautes Études pour la Science et la Technologie | In French | → Mathematics and natural sciences → Engineering, technology |
| IHP | Indicated Horsepower | In English | → Mechanical engineering |
| IHSR | Iranian Institute for Health Sciences Research | In English | → Biological sciences → Biotechnology → Medicine |
| IHTV | Interim Hypersonic Test Vehicle | In English | → Vehicle engineering |
| IIA | Integrated Irrigation-Aquaculture | In English | → 627 → Agricultural sciences |
| IIAM | International Institute for the Advancement of Medicine | In English | → Medicine |
| IIAT | Institut International d'Agriculture Tropicale = IITA | International Institute of Tropical Agriculture | In English |
In French | → Research institutes → Agricultural sciences |
| IIBHG | Institut za Imunobiologija i Humana Genetika = IIBHG | Institute of Immunobiology and Human Genetics | In English |
In Macedonian | → Genetics → Medicine |
| IIBHG | Institute of Immunobiology and Human Genetics = (look above) |
In English | → Research institutes → Genetics → Immunology and allergy |
| IICP | Institut International de Communication de Paris | In French | → Higher education, universities → 659 |
| IIE | Institution of Incorporated Engineers | In English | → Engineering, technology |
| IIN | Istituto Italiano di Navigazione = IIN | Italian Institute of Navigation | In English |
In Italian | → Geodesy, cartography → Vehicle engineering |
| IIN | Italian Institute of Navigation = (look above) |
In English | → Environmental technology, water supply, waste management → Vehicle engineering |
| IINA | Atti dell'Istituto Italiano di Navigazione | In Italian | → Serial publications, periodicals → Geodesy, cartography → Vehicle engineering |
| IIOP | In-Orbit Plane | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IIPA | Israeli International Pharmacy Association | In English | → Associations → Pharmacology, toxicology |
| IIPA | International Iridology Practitioners Association | In English | → Associations → 6158 |
| IIT | Indian Institute of Technology (www.iit.org) | In English | → Specialized or (poly)technical colleges |
| IIT | Israel Institute of Technology | In English | → Engineering, technology |
| IIT | Indian Institute of Technology | In English | → Engineering, technology |
| IIT | Indian Institute(s) of Technology | In English | → Specialized or (poly)technical colleges → Engineering, technology |
| IIT | Istituto di Informatica e Telematica | In Italian | → Computer science → Telecommunications |
| IITA | International Institute of Tropical Agriculture = IIAT (look above) |
In English | → Research institutes → Agricultural sciences |
| IJACS | International Journal of Adaptive Control and Signal Processing | In English | → Serial publications, periodicals → Telecommunications |
| IJCEM | International Journal for Computational Methods in Engineering Science and Mechanics | In English | → Serial publications, periodicals → 5196 → Engineering, technology |
| IJCES | International Journal of Computational Engineering Science | In English | → Serial publications, periodicals → 5196 → Engineering, technology |
| IJE | International Journal of Electronics | In English | → Serial publications, periodicals → Electronics |
| IJEFM | International Journal of Engineering and Fluid Mechanics Spring | In English | → Serial publications, periodicals → 532 → Engineering, technology |
| IJER | International Journal of Energy Research | In English | → Serial publications, periodicals → Energy economics |
| IJES | International Journal of Engineering Science | In English | → Serial publications, periodicals → Engineering, technology |
| IJFa | International Journal of Fatigue | In English | → Serial publications, periodicals → 620 |
| IJFE | International Journal of Fusion Energy | In English | → Serial publications, periodicals → Energy economics → Nuclear technology |
| IJFr | International Journal of Fracture | In English | → Serial publications, periodicals → 620 |
| IJHE | International Journal of Hydrogen Energy | In English | → Serial publications, periodicals → Energy economics |
| IJHM | International Journal of Hybrid Microelectronics Fall | In English | → Serial publications, periodicals → Electronics |
| IJHSE | International Journal of High Speed Electronics and Systems | In English | → Serial publications, periodicals → Electronics |
| IJHy | International Journal of Hyperthermia | In English | → Serial publications, periodicals → Medicine |
| IJICS | International Journal of Intelligent Control and Systems | In English | → Artificial intelligence → Serial publications, periodicals → Engineering, technology |
| IJIMW | International Journal of Infrared and Millimeter Waves | In English | → Serial publications, periodicals → Electricity, magnetism, electromagnetism → Telecommunications |
| IJIR | International Journal of Impotence Research | In English | → Sexual problems → Urology |
| IJLT | IEEE (Institute of Electrical and Electronics Engineers) Journal of Lightwave Technology | In English | → Serial publications, periodicals → Optics |
| IJMM | International Journal of Mini Microcomputers | In English | → Serial publications, periodicals → Hardware → Electronics |
| IJMS | International Journal of Mechanical Sciences | In English | → Serial publications, periodicals → 531 → Mechanical engineering |
| IJNME | International Journal for Numerical Methods in Engineering | In English | → Serial publications, periodicals → 5196 → Engineering, technology |
| IJNS | International Journal of Neural Systems | In English | → Serial publications, periodicals → Biological sciences → Neurology |
| IJOE | IEEE (Institute of Electrical and Electronics Engineers) Journal of Oceanic Engineering | In English | → Serial publications, periodicals → 627 → 629123 |
| IJOMS | International Journal of Oral and Maxillofacial Surgery | In English | → Serial publications, periodicals → Surgery, orthopaedics, ophthalmology |
| IJPES | International Journal of Physical and Engineering Sciences | In English | → Serial publications, periodicals → Physics → Engineering, technology |
| IJPM | International Journal of Polymeric Materials | In English | → Serial publications, periodicals → Chemistry → Chemical technology |
| IJPR | International Journal of Production Research | In English | → Serial publications, periodicals → Engineering, technology |
| IJQE | IEEE (Institute of Electrical and Electronics Engineers) Journal of Quantum Electronics | In English | → Serial publications, periodicals → Electronics |
| IJRA | IEEE (Institute of Electrical and Electronics Engineers) Journal of Robotics Automation | In English | → Serial publications, periodicals → Electrical engineering |
| IJRQS | International Journal of Reliability, Quality and Safety Engineering | In English | → Serial publications, periodicals → Engineering, technology |
| IJRR | International Journal of Robotics Research | In English | → Serial publications, periodicals → Electrical engineering → Electronics |
| IJRS | International Journal of Remote Sensing | In English | → Serial publications, periodicals |
| IJSAC | IEEE (Institute of Electrical and Electronics Engineers) Journal on Selected Areas in Communications | In English | → Serial publications, periodicals → Telecommunications |
| IJSC | International Journal of Satellite Communications | In English | → Serial publications, periodicals → Spaceflight engineering, astronautics → Telecommunications |
| IJSE | International Journal of Solar Energy | In English | → Serial publications, periodicals → Energy economics |
| IJSSC | IEEE (Institute of Electrical and Electronics Engineers) Journal of Solid-State Circuits | In English | → Serial publications, periodicals → Electronics |
| IJTJE | International Journal of Turbo Jet Engines | In English | → Serial publications, periodicals → Vehicle engineering |
| IKEA | Ingvar Kamprad Elmtaryd Agunnaryd | In Swedish | → Timber and woodworking industry |
| IKMA | Industrielles Kompetenzzentrum für Mechatronik und Automation | In German | → Mechanical engineering |
| IKT | Informations- und Kommunikationstechnologie = TIC | Tecnologías de la Información y la Comunicación | In Spanish = TIC | Technologies de l'Information et de la Communication | In French = ICT | Information and Communications Technology | In English = IKT | Informations- og kommunikationsteknologi | In Danish = IKT | Inligtings- en kommunikasietegnologie | In Afrikaans = ICT | Informatie- en Communicatietechnologie | In Dutch = TMK | Teknologi Maklumat dan Komunikasi | In Malay |
In German | → Computer science → Telecommunications |
| IKT | Informations- og kommunikationsteknologi = TIC, ICT, TMK (look above) |
In Danish | → Computer science → Telecommunications |
| IKT | Inligtings- en kommunikasietegnologie = TIC, ICT, TMK (look above) |
In Afrikaans | → Computer science → Telecommunications |
| ILA | Instrument Landing Approach | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| ILA | Institut für Luftfahrtantriebe | In German | → Aeronautics, aircraft |
| ILAE | International Ligue Against Epilepsy (www.ilae.org) | In English | → Organizations and associations → Neurology |
| ILAS | Instrument Landing Approach System | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| ILC | International Latex Company | In English | → Chemical technology |
| ILC | Initial Launch Capability | In English | → Spaceflight engineering, astronautics |
| ILCSM | IEEE (Institute of Electrical and Electronics Engineers) LCS Magazine | In English | → Serial publications, periodicals → Telecommunications |
| ILEC | Incumbent Local Exchange Carrier | In English | → Telecommunications |
| ILERA | Internacia Ligo de Esperantistaj Radioamatoroj | In Esperanto | → Organizations and associations → Telecommunications |
| ILLW | Intermediate and Low Level Waste | In English | → Nuclear technology → Environmental technology, water supply, waste management |
| ILM | Institut für Laboratoriumsmedizin, Klinische Chemie und Molekulare Diagnostik | In German | → Research institutes → Biochemistry, biophysics → Pharmacology, toxicology → 6160 |
| ILM | Institut Louis Malardé | In French | → Medicine |
| ILRV | Integral Launch and Reentry Vehicle | In English | → Spaceflight engineering, astronautics |
| ILS | Instrument Landing System | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| ILSSE | Integrated Life Science Shuttle Experiment | In English | → Biological sciences → Spaceflight engineering, astronautics |
| ILSSM | Israeli Society for Sexual Medicine | In English | → Organizations and associations → Sexual problems → Urology |
| ILT/RT | Imprecisely Located Target/Relocatable Target | In English | → Military engineering |
| ILTPE | Institute for Low Temperature Physics and Engineering = ФТИНТ | Физико-технический институт низких температур | In Russian = ФТІНТ | Фізико-технічний інститут низьких температур | In Ukrainian |
In English | → Physics → Engineering, technology |
| ILTS | IEEE (Institute of Electrical and Electronics Engineers) LTS | In English | → Serial publications, periodicals → Telecommunications |
| IM3 | Institut Mondor de Médecine Moléculaire | In French | → Biological sciences → Medicine |
| IMA | International Medical Association | In English | → Associations → Medicine |
| IMA | Integrated Microsystems Austria | In English | → Mechanical engineering |
| IMA | Information, Medien, Agrar | In German | → Newspapers, journalism → Agricultural sciences |
| IMA | Interdisciplinary Medical Association | In English | → Associations → Medicine |
| IMAI | Integrated Management of Adolescent and Adult Illness | In English | → Pathology |
| IMAP | Internet Message Access Protocol | In English | → Networks, communication → Telecommunications |
| IMASSA | Institut de Médecine Aérospatiale - Service de Santé des Armées | In French | → Medicine → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IMBA | Institute of Molecular Biotechnology of the Austrian Academy of Science (www.imba.oeaw.ac.at) | In English | → Biological sciences → Biotechnology |
| IMBA | Internationale Motorsport Bond voor Amateurs (www.imba-mx.com) | In Dutch | → Organizations and associations → Vehicle engineering → Transport and postal services |
| IMBLMS | Integrated Medical/Behavioral Laboratory Measurement | In English | → Medicine |
| IMC | Indice de Masse Corporelle | In French | → Personal health and hygiene |
| IMCO | Intergovernmental Maritime Consultative Organization | In English | → Organizations and associations → International relations → 6295 → Transport and postal services |
| IME | Institut Méditerranéen de l'Eau | In French | → Hydrology → Environmental technology, water supply, waste management |
| IMEI | International Mobile Equipment Identity | In English | → Telecommunications |
| IMeRv | International Metals Reviews | In English | → Serial publications, periodicals → Metallurgy |
| IMF | Impianti Macchine Fonderia | In Italian | → Metallurgy |
| IMGWL | IEEE (Institute of Electrical and Electronics Engineers) Microwave and Guided Wave Letters | In English | → Serial publications, periodicals → Telecommunications |
| IMI | Innovative Medicines Initiative | In English | → Medicine |
| IMIT | Institute for Management of Innovation and Technology | In English | → Management → Engineering, technology |
| IMLEO | Initial Mass in Low Earth Orbit | In English | → Astronomy → Spaceflight engineering, astronautics |
| IMM | Institut des Mines de Marrakech | In French | → Specialized or (poly)technical colleges → Mining |
| IMN | Instytut Metali Nieżelaznych (www.imn.gliwice.pl) | In Polish | → Research institutes → Metallurgy |
| IMO | Internacia Mar-Organizo = IMO | International Maritime Organization | In English = OMI | Organisation Maritime Internationale | In French |
In Esperanto | → International relations → Marine research, oceanography → 6295 → Agricultural sciences |
| IMO | International Maritime Organization = OMI (look above) |
In English | → International relations → Marine research, oceanography → 6295 → Agricultural sciences |
| IMP | Institute of Molecular Pathology | In English | → Biochemistry, biophysics → Pathology |
| IMP | Inflatable Micrometeoroid Paraglider | In English | → Astronomy → Spaceflight engineering, astronautics |
| IMP/LMM | Ingénierie des Matériaux Polymères/ Laboratoire Matériaux Macromoléculaires | In French | → Research institutes → 620 → Plastic industry |
| IMPACT | International Marketing and Promotional Activities | In English | → 6588 |
| IMPS | Instant Messaging and Presence Service | In English | → Telecommunications |
| IMR | Infant Mortality Rate = ММВБ | Московская межбанковская валютная биржа | In Russian = MICEX | Moscow Interbank Currency Exchange | In English = МБВБ | Мускав банксен валютă биржи | In Chuvash = AKB | Angka Kematian Bayi | In Indonesian = TMI | Taxa de Mortalidade Infantil | In Portuguese = TMI | Taux de Mortalité Infantile | In French = TMI | Taxa de Mortalitat Infantil | In Catalan |
In English | → Statistics → Pediatry |
| IMRv | International Materials Reviews | In English | → Serial publications, periodicals → 620 |
| IMS | Interplanetary Monitor Satellite | In English | → Astronomy → Spaceflight engineering, astronautics |
| IMS | IP Multimedia Subsystem | In English | → Telecommunications → Computer science |
| IMSI | International Mobile Subscriber Identity | In English | → Telecommunications |
| IMSO | International Mobile Satellite Organization | In English | → Associations → Spaceflight engineering, astronautics → Telecommunications |
| IMSS | In-Flight Medical Supply System | In English | → Medicine → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IMST3 | Innovation in Mathematics, Science and Technology Teaching | In English | → Education → Mathematics and natural sciences → Mathematics → Engineering, technology |
| IMT | Intima Media Thickness = EIM | Espace Intima Média | In French |
In English | → Blood and circulatory system → Cardiology |
| IMT | Institutul Naţional de Cercetare-Dezvoltare pentru Microtehnologie | In Romanian | → Engineering, technology |
| IN | Istituto di Neuroscienze | In Italian | → Anatomy → Neurology |
| INAA | Institut National Agronomique d'Alger | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INADR | Institut National Agronomique pour le Développement Rural | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INAF | Institut des Nutraceutiques et des Aliments Fonctionnels | In French | → Nutrition → Agricultural sciences → Beverage industry → Food technology |
| INAP | Intelligent Network Application Part | In English | → Networks, communication → Telecommunications |
| INASO | Institut National de Formation Supérieure en Agriculture Saharienne de Ouargla | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INATN | Institut National Agronomique de Tunisie | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INATS | Institut National Agronomique de Thiès | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INAV | Institut National Agronomique et Vétérinaire Hassen II | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| INB | Installation Nucléaire de Base | In French | → Nuclear technology |
| INBO | International Network of Basin Organizations | In English | → 341224 → Hydrology → 626 → Engineering, technology |
| INCA | International Newspaper Colour Association | In English | → Associations → Newspapers, journalism → Graphic industries, printing, publishing |
| INCA | Institut National du Cancer | In French | → Oncology |