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Iterative design
Iterative design is a design methodology that repeatedly cycles a product through prototyping, testing, analysis, and refinement, converging on a minimum viable product; variants include the spiral model, Scrum, and extreme programming.
Iterative filtering (signal processing)
Iterative filtering is an adaptive signal decomposition method, introduced by Lin, Wang, and Zhou in 2009 as a provably convergent alternative to empirical mode decomposition for nonlinear, nonstationary signals.
Iterative Hard Thresholding
Iterative hard thresholding (IHT) is an algorithm that recovers a sparse vector from few linear measurements by taking a gradient step each iteration and keeping only the largest entries.
Iterative interference cancellation
Iterative interference cancellation is a family of receiver algorithms in which a detector and channel decoder exchange soft information over passes, refining estimates to subtract interference; it underlies turbo equalization.
Iterative learning control
Iterative learning control (ILC) is a feedforward control method that improves the tracking accuracy of systems repeating the same task, updating the input after each trial from recorded errors.
Ithaca 37
The Ithaca 37, or Ithaca Model 37, is an American pump-action shotgun introduced in 1937 by the Ithaca Gun Company, notable for ejecting shells through the bottom.
Ithaca Energy
Ithaca Energy is a UK-based independent oil and gas exploration and production company, founded in 2004, focused on the UK North Sea and listed on the London Stock Exchange.
ITIC
ITIC is an organic non-fullerene acceptor molecule used in polymer solar cells; reported in 2015, it set a 6.80% fullerene-free record, and blends soon exceeded 11% efficiency.
ITIC-based organic solar cells
ITIC-based organic solar cells are organic photovoltaic devices using ITIC, a fused-ring non-fullerene acceptor reported in 2015 with a then-record 6.8% efficiency alongside the PTB7-Th donor.
ITiCSE
ITiCSE, or Innovation and Technology in Computer Science Education, is an annual ACM computing education conference sponsored by SIGCSE, held in a European city each summer since 1996.
ITIL
ITIL, formerly the Information Technology Infrastructure Library, is a best-practice framework for IT service management, developed by the UK's CCTA from the late 1980s and led by AXELOS.
Itiro Tani (谷一郎)
Itiro Tani (谷一郎) was a Japanese aerodynamicist at the University of Tokyo, known for the invention of the laminar-flow airfoil and elected to the US National Academy of Engineering in 1979.
ITM Power
ITM Power is a British manufacturer of PEM electrolysers for green hydrogen, headquartered in Sheffield, England, and listed on the London Stock Exchange's AIM market.
Itochu Enex
Itochu Enex (伊藤忠エネクス) is a Japanese energy trading and retailing company headquartered in Tokyo, founded in 1961 and majority-owned by Itochu Corporation, handling petroleum, LP gas, and electricity retail.
ITS Station
An ITS station (ITS-S) is a standardized communication node for intelligent transport systems, defined in ISO 21217, letting vehicles, roadside units, and servers from different manufacturers exchange safety messages.
Itsukushima Shrine (厳島神社)
Itsukushima Shrine (厳島神社, Itsukushima-jinja) is a Shinto shrine on the island of Miyajima in Hiroshima Prefecture, Japan, known for its vermilion buildings and torii gate standing over the sea.
ITT Inc.
ITT Inc. is an American industrial manufacturer of pumps, valves, brake pads, and harsh-environment connectors, with $3.9 billion in sales in 2025 and roots in International Telephone and Telegraph.
Itta Gas Field
The Itta Gas Field is a producing shallow-water field in the Gulf of Mexico about 24 kilometers northwest of Dos Bocas, Tabasco, discovered in 2019 and operated by PEMEX.
ITU Radiocommunication Sector
The ITU Radiocommunication Sector (ITU-R), created in 1992, is the branch of the International Telecommunication Union that manages the radio-frequency spectrum and satellite orbits and maintains the Radio Regulations treaty.
ITU Telecom World
ITU Telecom World was a global telecommunication exhibition and policy forum series organized by the International Telecommunication Union from 1971, first held in Geneva, until its 2020 renaming as ITU Digital World.
ITU Telecommunication Development Sector
The ITU Telecommunication Development Sector (ITU-D) is the International Telecommunication Union branch, created in 1992, that promotes ICT development in developing countries to close the digital divide.
ITU-R P.1546
ITU-R P.1546 is an ITU propagation model for point-to-area prediction of radio field strength for terrestrial services from 30 MHz to 4,000 MHz and up to 1,000 km.
ITU-T
ITU-T, known until 1993 as the CCITT, is the Telecommunication Standardization Sector of the International Telecommunication Union, developing voluntary international telecom standards called ITU-T Recommendations.
ITU-T G.652
ITU-T G.652 is the ITU recommendation specifying standard single-mode optical fiber with zero dispersion around 1310 nm; it dates from 1984 and dominates the world's fixed networks.
ITU-T G.657
ITU-T G.657 is an ITU recommendation defining bend-insensitive single-mode optical fiber that keeps signal loss low at bend radii as tight as 5 mm, aimed at fiber-to-the-home networks.
ITU-T G.694.1
ITU-T G.694.1 is an ITU-T recommendation defining the DWDM frequency grid, anchored at 193.1 THz, with fixed spacings from 12.5 to 100 GHz and a flexible grid.
Itumbiara hydroelectric plant
The Itumbiara hydroelectric plant (UHE Itumbiara) is a 2,082 MW Brazilian hydroelectric dam on the Paranaíba River between Itumbiara, Goiás, and Araporã, Minas Gerais, operated by Furnas since 1980.
ITunes
iTunes, also known as Apple iTunes, is Apple's media player, library manager, and online media store, launched in 2001 and dominant for digital music until replaced by Apple Music in 2019.
Itut Oil and Gas Field
The Itut Oil and Gas Field is an operating conventional oil and gas field in Nigeria, one of hundreds of named fields in the Niger Delta Province that holds nearly all of the country's petroleum.
ITV Meridian
ITV Meridian, also known as Meridian Broadcasting or Meridian Television, is the ITV regional news service for southern England, launched on 1 January 1993, replacing TVS.