- 4 Auction houses
- 5 Auctioneers
- 6 Auctions
- 9 Audiences
- 20 Auditoriums
- 1 August (month)
- 1 Augusta Frederica, Duchess of Brunswick
- 1 Auguste Charles & Co.
- 1 Augustine Cohn & Cie.
- 10 Augustine, Saint, Bishop of Hippo
- 1 Augustinians
- 1 Auld lang syne
- 1 Aull's Hotel
- 9 Aurangzeb, Emperor of Hindustan, 1618-1707
- 3 Aurora (Greek deity)
- 3 Aurora (Sculpture)
- 1 Austin G. Day (Firm)
- 9 Austin, Henry, 1811 or 12-1861
- 3 Austin, Letitia, 1816-1893
- 1 Austin, Sarah, 1793-1867
- 16 Australia
- 1 Australian Turkey
- 33 Austria
- 8 Austria-Hungary
- 1 Austrian harvesters (Work of Art)
- 26 Authors
- 1 Autocar
- 2 Autogiros
- 6 Autographs
- 6 Autographs (manuscripts)
- 1 Automat Lunch Room
- 1 Automatic Steam Carpet Cleaning Works
- 1 Automation
- 8 Automats
- 18 Automobile dealerships
- 2 Automobile driving
- 2 Automobile equipment & supplies
- 2 Automobile equipment & supplies stores
- 1 Automobile graveyards
- 1 Automobile industry
