Transportation
- Gemini Air Cargo, an airline of the United States
- Air Gemini, an airline of Angola
- Isuzu Gemini, a car built by Isuzu
- Holden Gemini, a car derived from the Isuzu model, made by GM-Holden
- Marsden Gemini, research glider
- MS Gemini, a cruise ship
- Miles Gemini, a British 1940s four-seat aircraft
- Gemini, a development-stage codename for the 200Tdi Land Rover engine
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