| Slot Machine |  Atlantis Riches | 2001 | Stargames, Ltd. Australia |
| Slot Machine | Atomic Coyote 5x4 Bonus Jackpots | 2011 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Attack from Mars | 1997 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Attack from Mars / Revenge from Mars | 2010 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Attack of the Monsters | 200? | Aristocrat Leisure Industries Pty, Ltd. |
| Slot Machine | Attack on Mars | 2009 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Attila | 2007 | AGI Austrian Gaming Industries Novomatic Group |
| Slot Machine | Au Père Bidard | 1911 | Mejeannel, Louis Paris, France |
| Slot Machine | Auction House | 1999 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Aunt Winnie's Cookie Dough | 200? | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | Aussie 8 Lines Special Model 2018 | 199? | Sigma Enterprises, Inc. Tokyo, Japan |
| Slot Machine | Aussie Wonders Double Hit Game Plus | 2010 | Ainsworth Game Technology, Ltd. |
| Slot Machine | Austin Powers | 2001 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Austin Powers - Time Portal | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Austin Powers Poker | 2001 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Australia Gold | 2006 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Australia Gone Wild | 2005 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Australian Gold Big Event - Press Your Luck | 2009 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Australian Hunter | 200? | Stargames, Ltd. Australia |
| Slot Machine | Australian Top Hat Model 1093-1 | 1976 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | Auteuil Longchamp | 1936 | Saaja France |
| Slot Machine | Auto Roulette | 1985 | Games of Nevada |
| Slot Machine | Auto-Craps | 1974 | Dale Engineering Co. Los Angeles, CA, USA |
| Slot Machine | Auto-Punch | 1936 | Daval Mfg. Co. Chicago, IL, USA |
| Slot Machine | Autofruit | 196? | Jamieson Automatics England |
| Slot Machine | Automated American Roulette 10-Player | 200? | AIK d.o.o. Kozina, Slovenia |
| Slot Machine | Automated American Roulette 5-Player | 200? | AIK d.o.o. Kozina, Slovenia |
| Slot Machine | Automated American Roulette 8-Player | 200? | AIK d.o.o. Kozina, Slovenia |
| Slot Machine | Automatic | 1956 | West Automaten Moers, Germany |
| Slot Machine | Automatic Check | 1893 | Schultze, Gustav F.W. San Francisco, CA, USA |
| Slot Machine | Automatic Check Machine | 1896 | Schall & Co., D.N. Chicago, IL, USA |
| Slot Machine | Automatic Chime Bells | 1899 | Ogden & Co. Chicago, IL, USA |
| Slot Machine | Automatic Counter Vendor | 1923 | Cooper Mfg. Co. San Francisco, CA, USA |
| Slot Machine | Automatic Counter Vendor Improved model | 1924 | Cooper Mfg. Co. San Francisco, CA, USA |
| Slot Machine | Automatic Dice | 1974 | Pennington & Bennett |
| Slot Machine | Automatic Jackpot Belle Diamond Front | 1947 | Buckley Mfg. Co. Chicago, IL, USA |
| Slot Machine | Automatic Mint Vender Mints of Quality | 1925 | Jennings & Co., O.D. Chicago, IL, USA |
| Slot Machine | Automatic O.K Counter Vender Mints of Quality | 1925 | Jennings & Co., O.D. Chicago, IL, USA |
| Slot Machine | Automatic Salesman | 1928 | Pace Mfg. Co. Chicago, IL, USA |
| Slot Machine | Automatic Salesman Mints of Merit | 1928 | Superior Confection Co. Columbus, OH, USA |
