History Music / IOSYS

The group most likely got their name from the kernel file of MS-DOS (IO.SYS), which was used by every UsefulNotes/PC98 machine.

** The group name itself might as well be named after a file named ''io.sys'' in MS-DOS (and subsequently, Windows 9x. Windows XP ended the practice as its boot sequence is based on the Windows NT line and thus uses NTLDR instead) which was used by every PC-98 machine. Plays nicely to their official website, which is named ''iosysos.com''

** The group name itself might as well be named after a file named ''io.sys'' in the MS-DOS (and subsequently, Windows 9x. Windows XP ended the practice as it’s boot sequence is based on the Windows NT line and thus uses NTLDR instead). Plays nicely to their official website, which is named ''iosysos.com''

** The group name itself might as well be named after a file named ''io.sys'' in the MS-DOS (and subsequently, Windows ). Plays nicely to their official website, which is named ''iosysos.com''

** The group name itself might as well be named after a file named ''io.sys'' in the Windows OS. Plays nicely to their official website, which is named ''iosysos.com''

* ClumsyCopyrightCensorship: [[AvertedTrope Averted]], for the most part. IOSYS re-released its ''Touhou Tsukitourou'' album from 2006 as ''Touhou Tsukitourou [[LampshadeHanging Safe!]]'' in 2009. The album had three new tracks, drawn from other IOSYS sources (including a previously limited-issue track), while removing three others. The three removed? [[AffectionateParody Parodies]] of songs from ''Anime/SaintSeiya'', Japanese singer Yousui Inoue, and LightNovel/HaruhiSuzumiya (the below-mentioned "Kire Kire Mayoi"). The album doesn't suffer from the removal.

* LongTitle: Several, which only get longer when the songs are themselves remixed, but the prize goes to the Website/NicoNicoDouga [[AffectionateParody parody]] "[Singing Attempt] The Brides that Queue Up the Affected Area are Impending the Precious Sun, Perfect Ignorant Fools! [Prismriver]", a medley of several of IOSYS's most popular songs, as performed by the Prismriver sisters.
* [[Memes/TouhouProject Memetic Mutation]]: IOSYS's more popular works, in addition to contributing to the aforementioned AlternateCharacterInterpretation, tend to generate memes within the Touhou community.
** Not just within the Touhou community, FOE!!

* FilkSong: What IOSYS's work can be considered as, in a broad sense. In a more narrow sense, a number of their songs are in the parody-filk style -- see [[{{Trivia/IOSYS}} the Trivia page]] for a list.

* EarlyInstallmentWeirdness: Their early [=CDs=] were mostly comedy skits rather than music.

* MohsScaleOfRockAndMetalHardness: Most of their songs rate 4 on this scale.

IOSYS is also known for the song "FOE", a remix based around the infamous [[BossInMookClothing bosses in mook clothing]] from ''VideoGame/EtrianOdyssey''. They provided one of the endings for the anime ''[[Manga/PenguinMusume Penguin Musume Heart]]'', and many of the songs for ''Anime/YumekuiMerry''.

See also {{Albatrosicks}} (a side project created by members ARM, quim, and miko to do their own stuff), {{monoROSETTA}} (member void's side project), and SugarHoneyBabies (IOSYS' "original idol unit").

IOSYS is a prolific {{doujin}} circle that specializes in music remixes, particularly vocal remixes of the background music from the ''VideoGame/{{Touhou}}'' series, with 33 albums (as well as several karaoke/alternate-remix and best-of albums and two re-releases) just dealing with ''Touhou'' in the past six years. Many of their vocal remixes have been given [[FanVid music videos]] by various artists. They also make plenty of original songs as well, including songs for rhythm games.

* [[{{Memes/Touhou}} Memetic Mutation]]: IOSYS's more popular works, in addition to contributing to the aforementioned AlternateCharacterInterpretation, tend to generate memes within the Touhou community.

** Also the [[ExactlyWhatItSaysOnTheTin appropriately titled]] [[https://www.youtube.com/watch?v=f5cUMm8YAnU Four and a Half Truly Irritating Minutes of Tewi Inaba.]]

** Also the appropriately titled [[https://www.youtube.com/watch?v=f5cUMm8YAnU Four and a Half Truly Irritating Minutes of Tewi Inaba.]]

IOSYS is a prolific {{doujin}} circle that specializes in music remixes, particularly vocal remixes of the background music from the ''VideoGame/{{Touhou}}'' series, with 33 albums (as well as several karaoke/alternate-remix and best-of albums and two re-releases) just dealing with ''Touhou'' in the past six years. Many of their vocal remixes have been given [[FanVid music videos]] by various artists.

* LongTitle: Several, which only get longer when the songs are themselves remixed, but the prize goes to the NicoNicoDouga [[AffectionateParody parody]] "[Singing Attempt] The Brides that Queue Up the Affected Area are Impending the Precious Sun, Perfect Ignorant Fools! [Prismriver]", a medley of several of IOSYS's most popular songs, as performed by the Prismriver sisters.

* ClumsyCopyrightCensorship: [[AvertedTrope Averted]], for the most part. IOSYS re-released its ''Touhou Tsukitourou'' album from 2006 as ''Touhou Tsukitourou [[LampshadeHanging Safe!]]'' in 2009. The album had three new tracks, drawn from other IOSYS sources (including a previously limited-issue track), while removing three others. The three removed? [[AffectionateParody Parodies]] of songs from SaintSeiya, Japanese singer Yousui Inoue, and LightNovel/HaruhiSuzumiya (the below-mentioned "Kire Kire Mayoi"). The album doesn't suffer from the removal.

* ThemeNaming: Each of IOSYS's album names (until ''Bloom'') contains a kanji that refers to a character from the series ''RozenMaiden''. See the [[http://en.touhouwiki.net/wiki/IOSYS Touhou Wiki]] page for more information.