History Main / XtremeKoolLetterz

* ''WesternAnimation/HazbinHotel'': The Egg Boys are spelled "Egg Bo'''iz'''".

** Even earlier, there was Alex Summers, aka ComicBook/{{Havok}}.

* A type of {{doppelganger}} spirit in ''Manga/AyakashiTriangle'' is called an "omokage". It's pronounced like the Japanese word for "image/vestige", but instead of the standard kanji spelling ("面影" or "俤"), it's written as [[SpellMyNameWithAnS either]] an AlternateCharacterReading of "分身" (normally read as "bunshin", meaning "other self") or just in katakana.

*** There's all the adaptations that pronounce it "Professor Ex-avier," just to make it clear to stupid viewers that there's an X in his name. "Xavier" is an archaic Spanish spelling of "Javier," so it should be "khavi-air" (or "zavvy-ay", in French), people. ("Ex-avier" is a common (mis)pronunciation of "Xavier" in RealLife, though).
*** The Spanish dubs fortunately make a point of pronouncing his name "Xavi-air".

* [=SpaceX=], a.k.a. UsefulNotes/SpaceExplorationTechnologiesCorporation. Elon Musk's other company, Tesla, has a car called the "Model X" despite having only three different models (the model numbers spell "[[LeetLingo S3XY]]"). He also set up an online bank called X.com (which later merged with Consinity to become [=PayPal=]), as well as an AI startup called xAI, named one of his children X AE A-XII Musk, and in July 2023, announced that he was rebranding Website/{{Twitter}} as X. Musk '''loves''' the letter X.

* This trope was popular during UsefulNotes/TheDarkAgeOfComicBooks and the Speculator Boom when comic creators were looking to make a quick buck off of original characters. The reasoning for using Xtreme Kool Letterz at this time was likely done to help insure that whatever name a creator came up with for their NinetiesAntiHero could be trademarked. You can't retain the rights to "Strike", but you can retain the rights to "Stryke".

* KDE, one of the many desktop environments available for [[UsefulNotes/{{Unix}} Linux and other Unix-like operating systems]], runs on this trope. Its name stands for "K Desktop Environment", with the K not standing for anything, and many of its included programs have the letter C in their names replaced with K, such as Konsole, or Kontact, or even just slap K in front of other words, like Kmail, or Ktorrent.

* UsefulNotes/PlaystationNetwork has a sort of video-magazine entitled Qore (Core).

** In reality, the show started out as "Extended Play" and received a retitle when it was relaunched, reducing "Extended" to "X". ''XP'' was floated as a title before the producers realized people would be confused that it was a tech show about [[UsefulNotes/MicrosoftWindows Windows XP]].

* UsefulNotes/MicrosoftWindows NT 5.1, also known as XP, which is supposed to be short for [=eXPerience=].

** When Nintendo introduced the UsefulNotes/NintendoEntertainmentSystem in North America and Europe, they [[CallARabbitASmeerp referred]] to its game cartridges as "Game Paks," a term which they continued using until the UsefulNotes/GameBoyAdvance.
** Two words: [[UsefulNotes/Nintendo64 Rumble Pak]]!

* The unofficial abbreviation usually used for the UsefulNotes/PlayStation (until the UsefulNotes/PlayStation2 came out, at least) was "[=PSX=]." This is because the console's codename during development was the "[=PlayStation=] Experimental." Made much worse by the fact that Sony actually released a separate console called the PSX (only in Japan, of course) which incorporated a video, photo, and music player with DVR support, along with the capability of playing [=PS=]/[=PS2=] games.

* The UsefulNotes/{{XBAND}} service used a primitive modem cartridge for the SNES/Genesis to connect to players (as if on a BBS) through a now-defunct service. The company that made it went on to create a Windows-based [=MPlayer=] service, which also eventually shut down. What made it even more Xtreme was the ''A'' in the logo was upside-down. Wait for it... '''XB∀ND'''!

* A lot of Creator/{{Rare}}'s early games for the UsefulNotes/ZXSpectrum and UsefulNotes/{{Commodore 64}}. ''Jetpac'', ''Tranz Am'', ''Atic Atac'', ''Sabre Wulf'', ''Underwurlde'', ''Blackwyche'' and ''Dragon Skulle'', half of these could be added to YeOldeButcheredEnglish as well.

* The interface used on the [[UsefulNotes/PlayStation3 PS3]], [[UsefulNotes/PlayStationPortable PSP]], and some Sony [=TVs=] is officially named the [=XrossMediaBar=] (pronounced cross media bar).

* ''VideoGame/AggressorsOfDarkKombat'', the title of a FightingGame for the UsefulNotes/NeoGeo, played on both ''Franchise/MortalKombat'' and the name of the company that created it, ADK.

** The UsefulNotes/GameBoyColor ''VideoGame/MegaManX'' games were titled ''Mega Man Xtreme''.

* After many years of identifying ''Wrestling/{{WrestleMania}}'' events with Roman numerals, #17 was officially X-Seven -- pronounced "ecks-seven". And the next year saw X8, "ecks-eight". From #19 (XIX) onwards, all-Roman numbers have been back in vogue.