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- 11 de Septiembre
- 160th Special Operations Aviation Regiment (Airborne)
- 1918 flu pandemic in India
- 1933 anti-Nazi boycott
- 1952 Iranian legislative election
- 1953 Iranian coup d'état
- 1954 Guatemalan coup d'état
- 1954 Syrian coup d'état
- 1963 South Vietnamese coup d'état
- 1963 Syrian coup d'état
- 1964 Brazilian coup d'état
- 1966 Ghanaian coup d'état
- 1973 Chilean coup d'état
- 1973–1974 stock market crash
- 1976 Argentine coup d'état
- 1979 Salvadoran coup d'état
- 1982 British Army Gazelle friendly fire incident
- 1982 Liberation Memorial
- 1985 Beirut car bombings
- 1989 Angola Lockheed L-100 crash
- 2007 Nova Scotia Liberal Party leadership election
- 2009 swine flu pandemic
- 2010 flash crash
- 2010–2012 killing of CIA sources in China
- 2013 mass surveillance disclosures
- 2015–2016 stock market selloff
- 2020 stock market crash
- 2022 stock market decline
- 20th Century Battlefields
- 3M
- 7 for All Mankind
- A.D. Club
- A.E. Dick Howard
- A.M. Rosenthal
- A.W. Schmidt
- A. B. Hammond
- A. Charles Baillie
- A. Charles Muller
- A. Davidson Dunton
- A. Doak Barnett
- A. H. Smith
- A. Kenneth Pye
- A. Lawrence Lowell
- A. M. Rosenthal
- A. Michael Spence
- A. W. Clausen
- A. W. Schmidt
- A. Wess Mitchell
- AASPIM
- ABB
- ABC News
- AMD
- AOL
- ARA Bahía Buen Suceso
- ARA Santa Fe (S-21)
- ASHG
- ASML Holding
- AT&T
- AT&T Corporation
- A Beacon of Hope
- A Hole in the Wall (1982 film)
- Aaron David Miller
- Aaron Maniam
- Aaron S. Williams
- Aaron Wildavsky
- Aatos Erkko
- Ababu Namwamba
- Abakuá
- Abasi Ene-Obong
- Abbott Laboratories
- Abbott M. Washburn
- Abbott Washburn
- Abbottabad Commission
- Abbottabad Commission Report
- Abby Aldrich Rockefeller Folk Art Museum
- Abby Joseph Cohen
- Abdu Ali al Haji Sharqawi
- Abdul Al Salam Al Hilal
- Abdul Razak Baginda
- Abdul Shakoor al-Turkistani
- Abdulaziz bin Salman Al Saud
- Abdulhadi al-Iraqi
- Abdullah bin Ali Al Thani
- Abdulsalam Haykal
- Abdus Salam
- Abhisit Vejjajiva
- Abigail Johnson
- Ableism
- Abou Elkassim Britel
- Aboubakr Jamaï
- Abraham David Sofaer
- Abraham Flexner
- Abraham Pais
- Abraham Rotstein
- Abram Bergson
- Abstract expressionism
- Abu Ahmed al-Kuwaiti
- Abu Faraj al-Libbi
- Abu Ghraib torture and prisoner abuse
- Abu Laith al-Libi
- Abu Mahdi al-Muhandis
- Abu Mu'az al-Jeddawi
- Abu Omar case
- Abu Zubaydah
- Academic study of Western esotericism
- Accenture
- Achmad Zaky
- Acid Dreams (book)
- Acorns Children's Hospice
- Acoustic Kitty
- ActionAid
- Action Against Hunger
- Acumen
- Ad Melkert
- Ada Osakwe
- Adam Aron
- Adam B. Ellick
- Adam Bly
- Adam Fletcher
- Adam Grant
- Adam Kinzinger
- Adam Lowry
- Adam Posen
- Adam S. Posen
- Adam Schaff
- Adam Silver
- Adam Smith
- Adam Solomon
- Adam Taylor
- Adam Tooze
- Adam Walinsky
- Adam Weinberg
- Adam Weishaupt
- Adam Werbach
- Adam Yarmolinsky
- Adam and Eve
- Adebola Williams
- Adel Fakeih
- Adel Mahmoud
- Adele S. Simmons
- Adele Simmons
- Adele Smith Simmons
- Adelphi Genetics Forum
- Adelson Foundation
- Aden Ridgeway
- Adena Friedman
- Adi Ignatius
- Adi Negev
- Adil Hadi bin Hamlili
- Aditi Avasthi
- Aditya Ghosh
- Aditya Mittal
- Adlai E. Stevenson
- Adlai Stevenson
- Adlai Stevenson III
- Adnan Menderes
- Adobe
- Adolf A. Berle
- Adolf A. Berle Jr.
- Adolfo Pérez Esquivel
- Adolph B. Spreckels
- Adolph W. Schmidt
- Adrian A. Basora
- Adrian Cheng
- Adrian David Cheok
- Adrian Fortescue
- Adrian Năstase
- Adrian S. Fisher
- Adrian Wooldridge
- Adriana Acosta
- Adriana Calvo
- Adriana Cisneros
- Adrienne Arsht
- Adrienne Germain
- Adventist Development and Relief Agency
- Aerin Lauder
- Aero Contractors (United States)
- Aerospace Heritage Foundation of Canada
- Aetna
- Africa Finance Corporation
- Afsaneh Mashayekhi Beschloss
- Afshin Mohebbi
- Afshin Molavi
- Aftermath of the Falklands War
- Agatha Sangma
- Agha Hasan Abedi
- Aginter Press
- Agnes Gund
- Agustín Carstens
- Agustín Goiburú
- Ahd Kamel
- Ahmad Ibrahim al-Sayyid al-Naggar
- Ahmad Isma'il 'Uthman Saleh
- Ahmad Nader Nadery
- Ahmad Rezaee
- Ahmad Salama Mabruk
- Ahmed Aboutaleb
- Ahmed Chalabi
- Ahmed Mater
- Ahmed Zayat
- Ahmet Üzümcü
- Aimee Mullins
- Ain Aouda secret prison
- Air America (airline)
- Air Asia (Taiwan)
- Air Bridge Denial Program
- Aja Brown
- Ajay Agrawal
- Ajay Banga
- Ajay Kalsi
- Ajay Piramal
- Ajaypal Singh Banga
- Akhil Iyer
- Akhilesh Yadav
- Akhtar Mansour
- Akihiko Hoshide
- Akihiko Tanaka
- Akiko Naka
- Akila Radhakrishnan
- Aklilu Lemma
- Akshay Naheta
- Al Flood
- Al Gore
- Al Kelly
- Al Manahil Welfare Foundation Bangladesh
- Alaa Batayneh
- Alaa Murabit
- Alain C. Enthoven
- Alain Chevalier
- Alain Enthoven
- Alain Juppe
- Alain Juppé
- Alain Poher
- Alain de Botton
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- Alan Blinken
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- Alan D. Bersin
- Alan Duncan
- Alan Greenspan
- Alan Gregg
- Alan John Blinken
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- Alan Knott-Craig
- Alan Lee Williams
- Alan M. Taylor
- Alan Spoon
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- Alan Westerman
- Alanson B. Houghton
- Alastair Buchan
- Albemarle Corporation
- Albert Bourla
- Albert Breton
- Albert Bush-Brown
- Albert Carnesale
- Albert Fishlow
- Albert H. Wiggin
- Albert J. Meyer
- Albert Legault
- Albert Meyer
- Albert O. Hirschman
- Albert Ritchie
- Albert Rivera
- Albert Rivera Díaz
- Albert Sassoon
- Albert Shanker
- Albert Shaw
- Albert Strauss
- Albert Wohlstetter
- Alberta Eugenics Board
- Albertina Carri
- Alberto Alemanno
- Alberto Alesina
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- Alberto Giovannetti
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- Alberto J. Mora
- Alberto Nagel
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- Alcoa
- Alden W. Clausen
- Aldous Huxley
- Aldous Leonard Huxley
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- Alejandro N. Mayorkas
- Alejandro Ramírez
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- Alek Wek
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- Aleksander Smolar
- Aleksey Pushkov
- Alessandra Galloni
- Alessandro Benetton
- Alessandro Profumo
- Alex's Lemonade Stand Foundation
- Alex Karp
- Alex Okosi
- Alex Rodriguez
- Alex S. Jones
- Alex Stamos
- Alex Wallace
- Alex Wyatt
- Alexa von Tobel
- Alexander
- Alexander B. Cummings Jr.
- Alexander Baring
- Alexander Betts
- Alexander Dallin
- Alexander De Croo
- Alexander Eckstein
- Alexander Fraser
- Alexander Graf Lambsdorff
- Alexander Görlach
- Alexander H.G. Rinnooy Kan
- Alexander Haig
- Alexander Heard
- Alexander Karageorgevitch
- Alexander King
- Alexander King (scientist)
- Alexander L. George
- Alexander Lambsdorff
- Alexander Legge
- Alexander M. Haig Jr.
- Alexander Mirtchev
- Alexander Mishkin
- Alexander Pechtold
- Alexander R. Vershbow
- Alexander Rabinowitch
- Alexander Rinnooy Kan
- Alexander S. Onassis Foundation