Other Uses
- Simpson (appliance manufacturer), former manufacturer and brand of whitegoods in Australia
- Simpson index, a diversity index in ecology
- Simpson Thacher & Bartlett, law firm
- Simpson Performance Products, an American motorsports parts supplier
- Simpsons (department store), defunct Canadian department store
- Simpsons of Piccadilly, a defunct clothing store in London
- Simpson's paradox, in statistics
- Simpson's rule, in mathematics
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