| Acura TSX | Acura ZDX | Acutus |
| ACVR1 | ACVR1B | ACVR1C |
| ACVR2A | ACVR2B | ACVRL1 |
| ACY1 | ACY3 | ACYP1 |
| ACYP2 | Acytota | AD |
| Ad Astra Rocket Company | Ad Calendas Graecas | Ad fontes |
| Ad gentes | Ad hoc | Ad hoc дипломатія |
| Ad hoc поліморфізм | Ad hominem | Ad Hominem |
| Ad Hominem (гурт) | Ad Hominem (значення) | Ad ignorantiam |
| Ad libitum | AD LIBITUM | Ad maiorem Dei gloriam |
| AD MAJOREM DEI GLORIUM | Ad metum | Ad misericordiam |
| Ad nauseam | Ad populum | Ad usum Delphini |
| Ad verecundiam | Ad-Aware | Ada |
| ADA | Ada (мова програмування) | ADA2 |
| Adacna | ADAD1 | ADAD2 |
| Adagio | Adagio (гурт) | ADAL |
| Adalia bipunctata | ADALINE | Adaline |
| Adam F | Adam Opel GmbH | Adam А500 |
| Adam's Song | ADAM10 | ADAM11 |
| ADAM12 | ADAM15 | ADAM17 |
| ADAM18 | ADAM19 | ADAM2 |
| ADAM20 | ADAM21 | ADAM22 |
| ADAM23 | ADAM28 | ADAM29 |
| ADAM30 | ADAM32 | ADAM33 |
| ADAM7 | ADAM8 | ADAM9 |
| ADAMDEC1 | Adami (автовиробник) | Adams |
| Adams (автовиробник) | Adams County | Adams County (метеорит) |
| Adams-Farwell | ADAMTS1 | ADAMTS10 |
| ADAMTS12 | ADAMTS13 | ADAMTS14 |
| ADAMTS15 | ADAMTS16 | ADAMTS17 |
| ADAMTS18 | ADAMTS19 | ADAMTS2 |
| ADAMTS20 | ADAMTS3 | ADAMTS4 |
| ADAMTS5 | ADAMTS6 | ADAMTS7 |
| ADAMTS8 | ADAMTS9 | ADAMTSL1 |
| ADAMTSL2 | ADAMTSL3 | ADAMTSL4 |
| ADAMTSL5 | Adamussiini | Adamussium |
| Adamussium colbecki | Adans. | Adansonia |
| Adansonia digitata | ADAP1 | ADAP2 |
| Adapiformes | Adapis | ADAR (білки) |
| ADARB1 | ADARB2 | Adasaurus |
| Adasaurus mongoliensis | ADAT1 | ADAT2 |
| ADAT3 | ADATA | Adımı Kalbine Yaz |
| Adûnaic | ADB | Adblock Plus |
| Adbusters | ADC | ADC Airlines |
| ADCC | ADCK1 | ADCK2 |
| ADCK5 | ADCY1 | ADCY10 |
| ADCY2 | ADCY3 | ADCY4 |
| ADCY5 | ADCY6 | ADCY7 |
| ADCY8 | ADCY9 | ADCYAP1 |
| ADCYAP1R1 | Add N to (X) | Add N to (X) (гурт) |
| ADD1 | ADD2 | ADD3 |
| Addax | Addax nasomaculatus | Addicted (пісня Simple Plan) |
| Addicted to Music | Addicted To Music | Addicted to You |
| Addicted to You (пісня Шакіри) | Addiction Crew | Addison Wesley |
| Addison-Wesley | Addison–Wesley | Address Book |
| Address generation unit | Address Group | Address Resolution Protocol |
| Address space layout randomization | Addy V | ADEDY |
| Adele | Adelina Ismajli | Adelina Patti |
| Adelitas Way | Adelitas Way (альбом) | Adelogyrinidae |
| Adelogyrinus | Adelogyrinus simorhynchus | Adelomyrmex |
| Adelospondyli | Adelowalkeria | Adelphia |
| Adelphobates | Adelphobates galactonotus | Adelphocoris lieolatus |
| Adelphocoris lineolatus | Adempiere | Adenium |
| Adenium obesum | Adenofora lilifolia | Adenomus |
| Adenophora lilifolia | Adenophora liliifolia | Adenoviridae |
| Adeona family | Adephaga | Adept |
| ADGAS | ADGB | ADGRA1 |
| ADGRA2 | ADGRA3 | ADGRB1 |
| ADGRB2 | ADGRB3 | ADGRD1 |
| ADGRE1 | ADGRE2 | ADGRE3 |
| ADGRE5 | ADGRF1 | ADGRF2 |
| ADGRF3 | ADGRF4 | ADGRF5 |
| ADGRG1 | ADGRG2 | ADGRG3 |
| ADGRG4 | ADGRG5 | ADGRG6 |
| ADGRG7 | ADGRL1 | ADGRL2 |
| ADGRL3 | ADGRL4 | ADGRV1 |
| ADH1A | ADH1B | ADH1C |
| ADH4 | ADH5 | ADH6 |
| ADH7 | ADHFE1 | ADI1 |
| Adiantum capillus-veneris | Adidas | Adidas Azteca |
| Adidas Beau Jeu | Adidas Brazuca | Adidas Brazuca 14 |
| Adidas Europa League 2009/2010 | Adidas Europa League 2010/2011 | Adidas Europass |
| Adidas Fevernova | Adidas Finale | Adidas Finale 10 |
| Adidas Group | Adidas International | Adidas International 2000, жінки, одиночний розряд |
| Adidas International 2001, жінки, одиночний розряд | Adidas International 2002, жінки, одиночний розряд | Adidas International 2003, жінки, одиночний розряд |
| Adidas International 2004, жінки, одиночний розряд | Adidas Jabulani | Adidas Roteiro |
| Adidas Tango 12 | Adidas Tango Durlast | Adidas Tango España |
| Adidas Telstar Durlast | Adidas Torfabrik | Adidas torfabrik |
| Adidas ZX (кросівки) | ADIG | Adimonia violacea |
| Adina | Adioz production | Adioz Production |
| AdiozProduction Studio | Adipocere | ADIPOQ |
| ADIPOR1 | ADIPOR2 | ADIRF |
| Adium | Adjacent channel power ratio | ADK |
| ADL | Adlair Aviation | Adler (автовиробник) |
| Adler Diplomat | Adler Trumpf | Adler Typ 10 |
| ADM | ADM2 | ADM5 |
| Adminer | Administrative Domain | Admiral Ancient Ships |
| Admiral Graf Spee (1931) | Admiral Graf Spee (1934) | Admiral Graf Spee (Важкий крейсер) |
| Admiral Hipper (1939) | Admiral Scheer (1933) | Admiral Scheer (важкий крейсер) |
| Admiral Sea Battles | Admiral: Ancient Ships | Admiral: Sea Battles |
