50 series may refer to:
Electronics
edit- HP 49/50 series, a type of graphing calculator made by Hewlett-Packard
Trains
edit- 1–50 series (CTA), a retired subway car type for the Chicago Transit Authority
- EMD SD50, also known as "50 series", a North American diesel locomotive type made by Electro-Motive Diesel
- Kyoto Municipal Subway 50 series operating for the Kyoto Municipal Subway
Trucks
edit- Dodge 50 Series, a box truck model operating in Europe
See also
edit- Detroit Diesel Series 50, a diesel engine for heavy-duty vehicles