| NW פרזידנט | NW רנצווייר | NW דגם B |
| NWA | NWN | NWO |
| NWo | NWOBHM | NWSL |
| NXIVM | Nxor | NXP סמיקונדקטור |
| NXP סמיקונדקטורס | NXT | NXT Halloween Havoc |
| NXT Halloween Havoc (2020) | NXT Halloween Havoc (2021) | NXT New Year's Evil |
| NXT New Year's Evil (2022) | NXT Stand & Deliver (2022) | NXT TakeOver |
| NXT TakeOver (2014) | NXT TakeOver (סדרת אירועים) | NXT TakeOver 31 |
| NXT TakeOver 36 | NXT TakeOver XXX | NXT TakeOver: Brooklyn 4 |
| NXT TakeOver: Brooklyn II | NXT TakeOver: Brooklyn III | NXT TakeOver: Chicago |
| NXT TakeOver: Chicago (2018) | NXT TakeOver: Chicago II | NXT TakeOver: Fatal 4-Way |
| NXT TakeOver: In Your House | NXT TakeOver: In Your House (2021) | NXT TakeOver: London |
| NXT TakeOver: New Orleans | NXT TakeOver: New York | NXT TakeOver: Orlando |
| NXT TakeOver: Philadelphia | NXT TakeOver: Phoenix | NXT TakeOver: Portland |
| NXT TakeOver: Respect | NXT TakeOver: Rival | NXT TakeOver: San Antonio |
| NXT TakeOver: Stand & Deliver | NXT TakeOver: Tampa Bay | NXT TakeOver: The End |
| NXT TakeOver: Toronto (2016) | NXT TakeOver: Toronto (2019) | NXT TakeOver: Unstoppable |
| NXT TakeOver: Vengeance Day | NXT TakeOver: WarGames (2019) | NXT TakeOver: WarGames (2020) |
| NXT TakeOver: WarGames II | NXT TakeOver: XXV | NXT UK |
| NXT UK TakeOver: Blackpool | NXT UK TakeOver: Blackpool II | NXT UK TakeOver: Cardiff |
| NXT WarGames (2021) | NXT Wrestling | NY Mag |
| NY Times | Nyaa Torrents | Nyaa.si |
| Nyan Cat | Nyayo Car | Nyc |
| Nyctereutes procyonoides | NYFF | Nymphaea |
| Nymphaea Alba | Nymphaea alba | Nymphaea caerulea |
| Nymphaeaceae | Nymphicus hollandicus | NYPD |
| NYPD (סדרת טלוויזיה) | NYPD Blue | NYPL |
| NYSE | NYT | NYU |
| NYU Press | NZGSAE | Ѯ |
| Ѳ | Ѻ | O |
| O (כתב קירילי) | O Ewigkeit, du Donnerwort, רי"ב 20 | O Ewigkeit, du Donnerwort, רי"ב 60 |
| O Fortuna | O heilges Geist- und Wasserbad, רי"ב 165 | O Holy Night |
| O jardim | O Lampião da Esquina | O mio babbino caro |
| O My God | O Sole Mio | O'G3NE |
| O'nyong'nyong virus | O'nyong-nyong virus | O.C. |
| O.D.D | O.K Computer | O.K. |
| O.Torvald | O.Torvald (להקה) | O2 |
| O2 ארנה (פראג) | O2 ארנה (לונדון) | O2 ארינה (פראג) |
| O2 וורלד | O3b | OA |
| Oakman-Hertel | OAS | Oasis |
| Oasis of the Seas | OAuth | OB Nordwest |
| OB West | Ob-La-Di Ob-La-Da | Ob-La-Di, Ob-La-Da |
| OBAFGKM | OBAK אודסה | Obamacare |
| OBE | Obe | Obituary |
| Object-relational mapping | Objection (Tango) | Objective C |
| Objective-C | Obla-Di-Obla-Da | Obleck |
| Oboy | OBS | Obscured by Clouds |
| Observe & Control | ObserveIT | Obsesión |
| Obsessed | Obsessed (שיר של אדיסון ריי) | Obsessions |
| Obsidian Entertainment | Obtained Enslavement | Obtener un Sí |
| OCaml | Ocaml | OCB |
| Occhi di ragazza | Occidentali's Karma | Occipital lobe |
| OCD | Ocean | Ocean (אלבום) |
| Ocean (שיר של מרטין גריקס) | Ocean (שיר של קרול ג'י) | Ocean Eyes |
| Ocean's Kingdom | Oceanhorn: Monster of Uncharted Seas | OceanLotus |
| Oceanodroma Leucorhou | OCHA | Ochradenus baccatus |
| Ochroma pyramidale | Ocimum | Ocimum basilicum |
| OCLC | OCLC (identifier) | Ocneropsis bethlehemita |
| OCP | OCPD | Ocpd |
| OCR | OCT | Octavarium |
| Octavo Día | October (אלבום) | Octopoda |
| Octopus | Octopus vulgaris | Octopus's Garden |
| OCTs | ODBC | ODD |
| Odds & Ends | Odds and ends | Odelay |
| ODESSA | ODF | Odin |
| Odnoklassniki.ru | Odobenus rosmarus | Odocoileus hemionus |
| Odocoileus virginianus | Odonata | Odontaspis |
| Odontesthes bonariensis | Odontoceti | Odontognathae |
| Odontophoridae | Odyssey: The Definitive Collection (אלבום) | OECD |
| OED | Oedipoda | OEIS |
| OEM | Oenanthe | Oenanthe hispanica |
| Oenanthe monacha | Oenothera drummondii | Oenothera rosea |
| Oesch's die Dritten | Oeverwatch | Of Lucifer and Lightning |
| OF2 | OFC | Ofcom |
| OFDM | Off My Face | Off our backs |
| Off Shore | Off the Radar | Off the Table |
| Off the Wall | Off the Wall (שיר של מייקל ג'קסון) | Off to See the World |
| Off to the Races | Off-the-Record Messaging | Office |
| Office 2007 | Office 365 | Office Live |
| Office of Scientific and Technical Information | Office Online | Office Open XML |
| Office Web Apps | Official Charts Company | Official New Zealand Music Chart |
| Officium Defunctorum | Offshore | Offshoring |
| Offspring | OFI כרתים | OFK בלגרד |
| Oforia | Ofra Haza | Often |
| Og | OGAE | Oganesson |
| OGB | Ogg | OGG |
| Ogg Vorbis | OGG vorbis | OGLE |
| OGLE-2005-BLG-390L | OGLE-2005-BLG-390Lb | OGLE-2007-BLG-368L |
| OGM | Ogo | Oh Cecilia (Breaking My Heart) |
| Oh Daddy | Oh Father | Oh Love |
| Oh Mother | Oh My God | Oh My God (שיר של אדל) |
| Oh My God! | Oh My Goddess! | Oh Na Na |
| Oh No! | Oh Santa! | Oh What a Circus |
| Oh Yeah! | Oh! Carol | Oh! Darling |
| Oh, Jeff | Oh, Jeff...I Love You, Too...But... | Oh, Pretty Woman |
| OHA | Ohio | Ohmigod |
| Oi Va Voi | Oil & Gas Journal | Oil and Gas Journal |
| Ojoceratops | Ojos Así | OJT |
| OK | OK (פירושונים) | OK (שיר של רובין שולץ) |
| OK (גוף כשרות) | OK Boomer | OK Computer |
