| 1C-Rarus | 1C:Enterprise | 1CC |
| 1chipMSX | 1cP-AL-LAD | 1CP-AL-LAD |
| 1CP-LSD | 1CRM | 1D |
| 1D (Begriffsklärung) | 1D-CFD-Systemsimulation von Wärme- und Stofftransport | 1D-LSD |
| 1Don'tStop1 | 1E | 1E (Unternehmen) |
| 1E - IT-Effizienz | 1E 0657-558 | 1E 0657−558 |
| 1E 161348−5055 | 1e Régiment Étranger de Parachutistes | 1E0657-56 |
| 1E161348-5055 | 1EdTech Consortium | 1er |
| 1er Arrondissement | 1er Arrondissement (Cotonou) | 1er Arrondissement (Parakou) |
| 1er Arrondissement (Porto-Novo) | 1er bmw | 1er Corps d'Armée Belge |
| 1er cycle franco-allemand | 1er division blindée | 1er Régiment Étranger de Parachutistes |
| 1er régiment étranger de cavalerie | 1er régiment étranger de parachutistes | 1er régiment d’infanterie |
| 1er régiment de chasseurs | 1er régiment de chasseurs à cheval | 1er régiment de chasseurs d’Afrique |
| 1er régiment de chasseurs parachutistes | 1er Régiment de Chasseurs Parachutistes | 1er régiment de chevau-légers lanciers |
| 1er régiment de chevau-légers lanciers polonais | 1er régiment de cuirassiers | 1er régiment de dragons |
| 1er régiment de grenadiers à pied de la Garde impériale | 1er régiment de hussards | 1er régiment de hussards parachutistes |
| 1er régiment de parachutistes d'infanterie de marine | 1er régiment de parachutistes d’infanterie de marine | 1er régiment des éclaireurs de la Garde impériale |
| 1er REC | 1ere Armée | 1ere armée |
| 1ere armée (1944–1945) | 1ere Armée (1944–1945) | 1ere armée (Frankreich) |
| 1ere Armée (Frankreich) | 1F | 1FL TV |
| 1FLTV | 1G | 1G-Regel |
| 1H | 1H,1H,2H,2H-Perfluordecanol | 1H,1H,2H,2H-Perfluordecansulfonsäure |
| 1H,1H,2H,2H-Perfluordecylacrylat | 1H,1H,2H,2H-Perfluoroctyliodid | 1H-Azepin |
| 1H-Azonin | 1H-Borepin | 1H-Boriren |
| 1H-Indol-3-carbaldehyd | 1H-Indol-3-ylmethanol | 1H-Pyrrol |
| 1H-Tetrazol | 1I | 1I/ Oumuamua |
| 1I/ʻOumuamua | 1α-Hydroxylase | 1α1,5α1-Trophy-3α-yl-3-monocarboxylat |
| 1J | 1JJ | 1K |
| 1K ZX Chess | 1K1 | 1K17 |
| 1Kor | 1KR | 1L |
| 1Lib1Ref | 1Live | 1live |
| 1LIVE | 1LIVE diggi | 1LIVE Diggi |
| 1Live diggi | 1LIVE Fiehe | 1Live Fiehe |
| 1LIVE Köln Comedy-Nacht XXL | 1LIVE Krone | 1Live Krone |
| 1Live Kunst | 1LIVE Kunst | 1Live Talk mit Frau Heinrich |
| 1M | 1mal1 | 1Malaysia Development Berhad |
| 1MDB | 1MF Records | 1MF Recordz |
| 1Mw | 1N | 1NF |
| 1nsane | 1O | 1P |
| 1P-AL-LAD | 1P-ETH-LAD | 1P-LSD |
| 1P/Halley | 1p36-Deletionssyndrom | 1Password |
| 1PL | 1plus | 1PPS |
| 1Q | 1Q20 | 1q21.1 Deletionsyndrome |
| 1q21.1-Deletionssyndrom | 1Q23 | 1Q7 |
| 1Q8 | 1Q84 | 1QJesa |
| 1QJesb | 1QpHab | 1QS |
| 1QSa | 1QSam | 1R |
| 1R,2S,5R-Isopulegol | 1re division blindée | 1re série 1930/31 |
| 1re série 1931/32 | 1re série 1932/33 | 1re série 1933/34 |
| 1re série 1934/35 | 1re série 1935/36 | 1re série 1936/37 |
| 1re série 1937/38 | 1re série 1938/39 | 1re série 1941/42 |
| 1re série 1943/44 | 1re série 1945/46 | 1re série 1948/49 |
| 1re série 1949/50 | 1re série 1950/51 | 1re série 1951/52 |
| 1re série 1952/53 | 1re série 1953/54 | 1re série 1954/55 |
| 1re série 1955/56 | 1re série 1956/57 | 1re série 1957/58 |
| 1re série 1958/59 | 1re série 1959/60 | 1re série 1960/61 |
| 1re série 1961/62 | 1re série 1962/63 | 1re série 1963/64 |
| 1re série 1964/65 | 1re série 1965/66 | 1re série 1966/67 |
| 1re série 1967/68 | 1re série 1968/69 | 1re série 1969/70 |
| 1re série 1970/71 | 1re série 1971/72 | 1re série 1972/73 |
| 1RXS J160929.1-210524 | 1S | 1S12 |
| 1S32 | 1SG | 1SL/CNS |
| 1st | 1st AACTA Awards | 1st AACTA International Awards |
| 1st Academy Awards | 1st Air Commando Group | 1st Airborne Division |
| 1st Airphonic Suite | 1st Annual Grammy Awards | 1st Armored |
| 1st Armored Division | 1st Armored Division (Vereinigte Staaten) | 1st Armoured Division |
| 1st Armoured Division (Vereinigtes Königreich) | 1st Cavalry Division | 1st Cavalry Division (U.S.) |
| 1st Cavalry Division (Vereinigte Staaten) | 1st Central County Ground | 1st Combat Applications Group (Airborne) |
| 1st Division | 1st FAI Women's European Hot Air Balloon Championship | 1st FAI Women's World Hot Air Balloon Championship |
| 1st FAI Women’s European Hot Air Balloon Championship | 1st FAI Women’s World Hot Air Balloon Championship | 1st filmacademy |
| 1st Golden Globe Awards | 1st Infantry Division | 1st Infantry Division (Vereinigte Staaten) |
| 1st Intelligence, Surveillance and Reconnaissance Brigade | 1st Ktah Khas | 1st Last Will |
| 1st Light Horse Brigade | 1st Marine Division | 1st Marine Expeditionary Force |
| 1st Marine Parachute Regiment | 1st Mariner Arena | 1st NATO Signal Battalion |
| 1st NSB | 1st Primetime Emmy Awards | 1st Queen's Dragoon Guards |
| 1st Screen Actors Guild Awards | 1st SFOD-D (A) | 1st SOW |
| 1st Special Forces Command (Airborne) | 1st Special Forces Operational Detachment-Delta | 1st Special Forces Operational Detachment-Delta (Airborne) |
| 1st Special Operations Wing | 1st Tank Battalion | 1st The Queen's Dragoon Guards |
| 1st The Queen’s Dragoon Guards | 1st US Army | 1st US Army Group |
| 1st US Cavalry Division | 1st Viscount Nelson | 1st Word Plus |
| 1st-Level Support | 1stMarDiv | 1T |
| 1T-LSD | 1time | 1Time |
| 1TR112 | 1TR6 | 1U |
| 1und1 | 1Up | 1UP |
| 1UP (Sprayer) | 1UP.com | 1Up.com |
| 1V | 1V-LSD | 1V‑LSD |
| 1W | 1WO | 1X |
| 1X Band | 1x1 | 1xtra |
| 1Xtra | 1Y | 1Z |
| 2 | 2 (Album) | 2 (Begriffsklärung) |
| 2 (Tanz) | 2 4 Grooves | 2 A |
| 2 a | 2 and a Half Men | 2 Andromedae |
| 2 ATAF | 2 × 2 im Himmelbett | 2 × Judas |
| 2 Banks of 4 | 2 Bar | 2 Baruch |
| 2 Belgen | 2 Bit Pie | 2 Blues for Cecil |
| 2 BROKE GIRL$ | 2 Broke Girls | 2 Broke Girls/Episodenliste |
| 2 Brothers on the 4th Floor | 2 Chainz | 2 Chainz/Diskografie |
| 2 Chr | 2 cm-Flak C/30 | 2 Cool 4 Skool |
| 2 Days in New York | 2 Days in Paris | 2 Days in the Valley |
| 2 de Mayo | 2 DEG | 2 durch 3 geht nicht |
