Model 20
- 20 (disambiguation)
- AJS Model 20
- AMC 20
- Beretta 21A Bobcat
- Bour-Davis
- Class 20 (disambiguation)
- Compaq Portable series
- Consolidated Model 20
- Daisy Outdoor Products
- Edwards Rail Car Company
- Flanders Model "20"
- Glock Model 20
- Haynes Automobile Company
- Hudson Motor Car Company
- Hupmobile
- IBM System/360 Model 20
- IBM copier family
- IBM hammer printers
- J.C. Higgins
- List of Norton motorcycles
- List of VAX computers
- List of motorcycles of the 1920s
- M1920 (disambiguation)
- M20 (disambiguation)
- M2020
- Marlin Model 20
- Massey-Harris Model 20
- Oldsmobile Model 20
- Polaroid Swinger
- Randall Made Knives
- SME Limited
- Taylorcraft Ranch Wagon
- Teletype Corporation
- Type 20 (disambiguation)
- UNIVAC
- Winchester Model 20
- Winton Motor Carriage Company