400 series may refer to:
- 400-series highways (Ontario), a network of freeways in Canada
- 400 Series Shinkansen, a Japanese high-speed train
- Rover 400 Series, a small British family car
- GE-400 series, computers produced by General Electric in the 1960s
- Kodak DCS 400 series, a series of digital SLR cameras produced by Eastman Kodak
Famous quotes containing the word series:
“Mortality: not acquittal but a series of postponements is what we hope for.”
—Mason Cooley (b. 1927)