- BAJ stands for Battery Association of Japan
- BAJ stands for Belarusian Association of Journalists
- BAJ stands for Bridge Asia Japan
- BAJ stands for Bank Aljazira (Saudi Arabia)
- BAJ stands for Bureau d’Aide Juridique
- BAJ stands for British Audio Journal
- BAJ stands for Bristol Aerojet (UK)
- BAJ stands for Brewers Association of Japan
- BAJ stands for Boite a Jeux (French: Box Games; gaming website)
- BAJ stands for Breviandes Animations Jeunes (French: Breviandes Young Entertainment)
Abbreviations And Their Meaning