Pada 1999

MacOS, Mac OS Klasik, IBM OS/2, OS X Yosemite, ChromeOS, BlackBerry OS, Palm OS, Remix OS, OS-tan, Os Desafinados, Mac OS X Lion, OS X El Capitan, Red Star OS, Mac OS X86, BlackBerry Tablet OS, Dex OS, Zorin OS, Elementary OS, Funtouch OS, BeOS (sistem operasi), Parrot OS, Mr. Os, Symbian, Qubes OS, Os Afro-sambas (album 1966), (162000) 1990 OS, Wear OS, Xiaomi HyperOS, ArcaOS, IPhone OS 1, Riwayat versi iOS, Osmium pentakarbonil, Wahyu OS, KaOS (sistem operasi), Os Afro-sambas (album 1990), IPadOS, MorphOS, C.F. Os Belenenses, WebOS, MenuetOS, Osmium tetroksida

WatchOS, Os Pinos, Daftar perangkat iOS, HiOS, IOS, CalyxOS, SteamOS, ReactOS, ColorOS, CentOS, PCLinuxOS, KaiOS, TempleOS, LineageOS, ClearOS, Osmium dioksida, App Store, AmigaOS, SunOS, GrapheneOS, HarmonyOS, PostmarketOS, SpaghettiOs, Jailbreaking di iOS, Osmium, Sistem operasi, Osmium oktafluorida, KolibriOS, HarmonyOS NEXT, Notarium, ARccOS Protection, Replicant (sistem operasi), Beos (disambiguasi), CyanogenMod, Android (sistem operasi), Ubuntu, Kereta rel listrik Oslo Metro seri MX3000, Mirza Ali Asghar Khan Amin al-Soltan, Komune di departemen Pyrénées-Atlantiques, Magdeburg, Lautaro_Youth_Movement, Museum_Istana, 阿波罗8号, Cold_War_(1948–1953), Plateau_(negara_bagian), Vincent_Bijlo, بي_كايند_ريوايند, マイネルレーニア, Chaim_Hezekiah_Medini, خوبي

MacOS, Mac OS Klasik, IBM OS/2, OS X Yosemite, ChromeOS, BlackBerry OS, Palm OS, Remix OS, OS-tan, Os Desafinados, Mac OS X Lion, OS X El Capitan, Red Star OS, Mac OS X86, BlackBerry Tablet OS, Dex OS, Zorin OS, Elementary OS, Funtouch OS, BeOS (sistem operasi), Parrot OS, Mr. Os, Symbian, Qubes OS, Os Afro-sambas (album 1966), (162000) 1990 OS, Wear OS, Xiaomi HyperOS, ArcaOS, IPhone OS 1, Riwayat versi iOS, Osmium pentakarbonil, Wahyu OS, KaOS (sistem operasi), Os Afro-sambas (album 1990), IPadOS, MorphOS, C.F. Os Belenenses, WebOS, MenuetOS, Osmium tetroksida, WatchOS, Os Pinos, Daftar perangkat iOS, HiOS, IOS, CalyxOS, SteamOS, ReactOS, ColorOS, CentOS, PCLinuxOS, KaiOS, TempleOS, LineageOS, ClearOS, Osmium dioksida, App Store, AmigaOS, SunOS, GrapheneOS, HarmonyOS, PostmarketOS, SpaghettiOs, Jailbreaking di iOS, Osmium, Sistem operasi, Osmium oktafluorida, KolibriOS, HarmonyOS NEXT, Notarium, ARccOS Protection, Replicant (sistem operasi), Beos (disambiguasi), CyanogenMod, Android (sistem operasi), Ubuntu, Kereta rel listrik Oslo Metro seri MX3000, Mirza Ali Asghar Khan Amin al-Soltan, Komune di departemen Pyrénées-Atlantiques, Magdeburg, Lautaro_Youth_Movement, Museum_Istana, 阿波罗8号, Cold_War_(1948–1953), Plateau_(negara_bagian), Vincent_Bijlo, بي_كايند_ريوايند, マイネルレーニア, Chaim_Hezekiah_Medini, خوبي, Viacom_(1952–2006), Sunnyvale_(Califórnia), Lettered_aracari, SimTunes, Sekolah_Tinggi_Intelijen_Negara, Sky_Max, Johanne_Schmidt-Nielsen, دانجال_(فيلم), Мазепа_(опера), عبقريات_العقاد_الإسلامية, Plateau_vole, Once_Upon_a_Time_There_Lived_a_Simple_Woman, العلاقات_الجزائرية_السلوفاكية, Walafrid_Strabo, Stavkirke_di_Urnes, Агарикоміцети, Memorias_de_Adriano, Muhammad_Yunus_(scholar), François_Clerc, الرودى_(السبرة), Тіно-Свен_Сушич, Somália_nos_Jogos_Olímpicos_de_Verão_da_Juventude_de_2010, 標準模型を超える物理, Kufstein, العلاقات_البنينية_الكوستاريكية, John_Hick, Akhir_zaman, Гадкие_лебеди_(повесть), Pemanas_sentral, 婚礼_(ワーグナー), Дьомін_Олег_Олексійович, Vườn_quốc_gia_Thung_lũng_Chết, All_for_the_Winner, Interstate_564, Феня, Vanja_Udovičić, Giordana_Angi, خط_عرض_12°_شمال, Tailor's_Hall, Stormy_Weather_(Echo_&_the_Bunnymen_song), Millard_K._Wilson, Eitaro_Ozawa, Đau_buồn_ở_động_vật, List_of_Black_Lightning_characters, A_Lie_of_the_Mind, Daftar_perusahaan_bus_di_Indonesia, Pile_(penyanyi), SS_Drottningholm, 11_Camelopardalis, توفيق_القصير, Pertempuran_Rocroi, Álbum_doble, Fred_Graver, Спиридон_(патриарх_Сербский), Gadung, Yozoh, Harapan_hidup, Catalão, Lesotho_at_the_2022_Commonwealth_Games, Florida_Gulf_Coast_Eagles_men's_basketball