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Iopolis Planum
Iopolis Planum is a roughly 235-km-wide plain (planum) on Jupiter's moon Io, centered at -35.29°, 332.71°W, IAU-approved in 1985 and named for the Greek town where Io was worshipped as a moon goddess, present-day Antioch.
Iopromide
Iopromide, marketed as Ultravist by Bayer, is a nonionic, low-osmolar, tri-iodinated X-ray contrast agent developed by Schering, launched in Europe in 1985, and sold in over 70 countries.
IOPS
IOPS, or input/output operations per second, is a storage performance metric counting the read and write operations a device completes in one second, alongside throughput and latency.
Iora Health
Iora Health was a Boston-based primary care company founded in 2011 by Rushika Fernandopulle, serving adults 65 and older on Medicare Advantage, and acquired by One Medical in 2021.
Iori Yagami (八神 庵)
Iori Yagami (八神 庵) is SNK's King of Fighters fighter, debuting in KOF '95 as Kyo Kusanagi's rival; heir of the Yagami clan that sealed Orochi, wielding purple flames, also known as Miss X in crossovers.
IOS
iOS, also known as Apple iOS, is Apple's mobile operating system for the iPhone, based on Darwin and requiring every app to be Apple code signed.
IOS 10
iOS 10 is the tenth major release of Apple's iOS mobile operating system for iPhone, iPad, and iPod touch, released as a free update in September 2016.
IOS 11
iOS 11 is Apple's 2017 mobile operating system for iPhone, iPad, and iPod touch, with ARKit, Core ML, a Files app, and a redesigned iPad dock.
IOS 12
iOS 12, also known as Apple iOS 12, is the twelfth major release of Apple's iOS mobile operating system, released on September 17, 2018 as a free update focused on performance.
IOS 13
iOS 13 is the thirteenth major release of Apple's iPhone operating system, released on September 19, 2019, introducing Dark Mode, Sign In with Apple, and a rebuilt Apple Maps.
IOS 14
iOS 14 is the fourteenth major release of Apple's iPhone operating system, released in September 2020 with redesigned Home Screen widgets, the App Library, and App Clips.
IOS 15
iOS 15 is the seventeenth major release of Apple's iPhone operating system, announced June 7, 2021 and released September 20, 2021 for iPhone 6s and later.
IOS 16
iOS 16, also known as iPhone OS 16, is Apple's sixteenth major iPhone operating system release, shipped September 12, 2022 with a customizable Lock Screen.
IOS 17
iOS 17 is the seventeenth major release of Apple's iPhone operating system, issued on September 18, 2023, four days before the iPhone 15 went on sale.
IOS 18
iOS 18 is the eighteenth major release of Apple's iPhone operating system, released in September 2024, adding Home Screen customization, a redesigned Photos app, RCS messaging, and locked apps.
IOS 26
iOS 26 is a major release of Apple's iPhone operating system, released in September 2025 with the Liquid Glass design and expanded Apple Intelligence features.
IOS 27
iOS 27, also called IPhone OS 27, is the twenty-seventh major release of Apple's iPhone operating system, released September 14, 2026 with a rebuilt Siri AI.
IOS 5
iOS 5 (iOS 5.0) is the fifth major release of Apple's mobile operating system, released on October 12, 2011 with iCloud, Notification Center, and over 200 new features.
IOS 6
iOS 6 is the sixth major release of Apple's mobile operating system for iPhone, iPad, and iPod touch, released in 2012 and known for the criticized Apple Maps launch.
IOS 7
iOS 7 is the seventh major release of Apple's iOS mobile operating system, released in September 2013 with a flat redesign by Jony Ive and over 200 new features.
IOS 9
iOS 9, also known as iOS 9.0, is the ninth major release of Apple's mobile operating system, released as a free update on September 16, 2015.
IOS jailbreaking
iOS jailbreaking removes Apple's software restrictions from an iPhone or iPad, letting users install unapproved apps and modify the system, which Apple says creates security risks.
IOS version history
iOS version history, also known as iPhone OS history, covers releases of iOS, Apple's operating system for the iPhone, from the original 2007 iPhone OS through current iOS 27.
Iosefo Baleiwairiki
Iosefo Baleiwairiki (Iosefo Masi), Fijian rugby player born 1998; Olympic gold in sevens at Tokyo 2020, silver at Paris 2024; now a centre for Lyon in the Top 14.
Iosif Berdiyev
Iosif Berdiyev (Иосиф Константинович Бердиев, also Yusup Berdiyew), Soviet artistic gymnast born 1924 in Ashgabat, died 1992 in Kyiv; 1952 Helsinki Olympic team gold medalist and seven-time USSR vault champion.
Iosif Gitel'son
Iosif Isaevich Gitel'son (1928–2022) was a Soviet and Russian biophysicist who founded the Krasnoyarsk school of biophysics, led the BIOS-3 closed life-support system, and won the Lomonosov Gold Medal.
Iosif Gurko
Iosif Vladimirovich Gurko (Иосиф Владимирович Гурко) was a Russian field marshal who crossed the Balkans and took Sofia in the 1877–78 war, then governed Warsaw from 1883 to 1894.
Iosif Kheifits (Иосиф Ефимович Хейфиц)
Iosif Kheifits (Иосиф Ефимович Хейфиц, 1905-1995), Soviet film director at Lenfilm; partnered with Aleksandr Zarkhi until 1950; directed Baltic Deputy, The Lady with the Dog (Cannes prize), and Chekhov, Turgenev, and Kuprin adaptations.
Iosif Kobzon
Iosif Kobzon (Иосиф Кобзон), also known as Joseph Kobzon, was a Soviet and Russian estrada baritone singer and State Duma deputy named People's Artist of the USSR in 1987.
Iosif Shklovsky
Iosif Shklovsky (1916–1985) was a Soviet theoretical astrophysicist who explained the Crab Nebula's radiation as synchrotron emission and co-wrote Intelligent Life in the Universe with Carl Sagan.