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Inverted bow
An inverted bow is a ship bow that slopes backwards above the waterline, with a fine vertical entry and no bulb, best known in Ulstein's X-BOW of 2005.
Inverted index
An inverted index, also called an inverted file, is a data structure that maps each search term to the documents containing it, central to text search systems.
Inverted organic solar cell
An inverted organic solar cell reverses the conventional layer order of an organic solar cell, placing the electron-collecting cathode on the substrate for better air stability.
Inverted perovskite solar cell
An inverted perovskite solar cell is a perovskite photovoltaic device built in the p-i-n layer order, reversing conventional n-i-p stacking, with certified efficiencies exceeding 27%.
Inverted roller screw
An inverted roller screw is a planetary roller screw variant in which the nut rotates and the shaft translates, used in compact actuators for aerospace, robotics, and defense.
Inverted-F antenna
The inverted-F antenna (IFA) is a compact monopole-type antenna whose shorting pin provides impedance matching; its planar form, the PIFA, is widely used in mobile phones.
Inverter (logic gate)
An inverter, or NOT gate, is the simplest logic gate, with a single input and output that are always opposite: a 0 input gives a 1 output.
Inverter air conditioner
An inverter air conditioner runs its compressor at continuously variable speeds via an inverter, instead of cycling on and off, first launched by Toshiba in 1980.
Inverter model
An inverter model is a mathematical or simulation representation of a power inverter, used in power system engineering, with fidelity levels from switched models, through averaged circuits, to positive-sequence phasor models.
Invertible neural network
An invertible neural network is a neural network whose mapping is a differentiable bijection, so it transforms probability densities exactly and supports generative modeling, density estimation, and reversible data transformations.
INVEST (mnemonic)
INVEST is a mnemonic checklist in agile software development for judging user stories, standing for Independent, Negotiable, Valuable, Estimable, Small, and Testable, coined by Bill Wake in 2003.
Investigations into the Chernobyl disaster
The investigations into the Chernobyl disaster are the official and scientific inquiries into the 26 April 1986 explosion of Chernobyl Unit 4, moving from blaming operators to blaming design.
Investigations of levee failures during Hurricane Katrina
The investigations of levee failures during Hurricane Katrina were forensic engineering studies from 2005 through 2009 that determined why New Orleans' protection system breached in 2005.
Investigatory Powers Commissioner
The Investigatory Powers Commissioner is a UK judicial officeholder, operating since September 2017, who reviews and audits public authorities' use of interception, communications data, and equipment interference.
Investment casting
Investment casting, also called lost-wax casting (cire perdue), is a metal-forming process in which a wax pattern is coated with ceramic to make a one-time mold for molten metal.
Investment tax credit (United States)
The investment tax credit is a US federal tax credit under Section 48 of the Internal Revenue Code that subsidizes eligible clean energy property by a percentage of its cost.
INVÍAS
INVÍAS (Instituto Nacional de Vías) is Colombia's national road institute, created in 1992 and attached to the Ministry of Transport. It builds and maintains the non-concessioned national road network.
Invicta (locomotive)
Invicta is an early British steam locomotive built in 1829 by Robert Stephenson and Company for the Canterbury and Whitstable Railway, preserved today at the Whitstable Museum and Gallery.
InVID-WeVerify
InVID-WeVerify is a free browser extension bundling video keyframe extraction, reverse image search, metadata reading, and forensic filters, created by AFP Medialab and first released in 2017.
Invideo AI
Invideo AI, styled invideo, is a web-based AI video creation platform by Invideo Inc that turns a text prompt or script into a finished video, refined by chat commands.
Invincible-class aircraft carrier
The Invincible class, also known as the through-deck cruiser class, was a class of three light aircraft carriers of the British Royal Navy, in service from 1980 to 2014.
Involute gear
An involute gear is a gear with tooth flanks shaped as the involute of a circle, transmitting rotation at a constant velocity ratio even with small mounting errors.
Inworld TTS-2
Inworld TTS-2 is a closed-loop conversational text-to-speech model released by Inworld AI as a research preview on May 5, 2026, in two tiers, Realtime TTS-2 and Realtime TTS-2 Flash.
Io (company)
Io, formally io Products, Inc., was a stealth AI hardware startup co-founded by former Apple designer Jony Ive and acquired by OpenAI in 2025 for $6.5 billion.
io_uring
io_uring is a Linux asynchronous I/O API introduced by Jens Axboe in Linux 5.1 in 2019, communicating through shared ring buffers instead of system calls.
IO-Link
IO-Link, formally the Single-drop Digital Communication Interface (SDCI), is a point-to-point digital communication interface for sensors and actuators in factory automation, standardized as IEC 61131-9 in 2013.
Ioannis Argyris
Ioannis Argyris (Ιωάννης Χατζιαργύρης), known as John Hadji Argyris, was a Greek engineer, born in 1913, who pioneered computer-based structural analysis and co-founded the finite element method.
Ioannis Chasiotis
Ioannis Chasiotis is an experimental mechanician and Caterpillar Professor of Aerospace Engineering at the University of Illinois Urbana-Champaign, known for MEMS platforms that test individual nanofibers and collagen fibrils.
Iomega
Iomega was an American computer storage company founded in 1980, based in Roy, Utah, and best known for the Zip drive; it sold over 410 million drives and was acquired by EMC in 2008.
IOMMU
An IOMMU (input-output memory management unit) is hardware that translates device DMA addresses into physical addresses, restricting device memory access and enabling virtual machine passthrough.