50 series
# 50 series

50 series may refer to:

## Electronics

* HP 49/50 series, a type of graphing calculator made by Hewlett-Packard

## Trains

* 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

* Dodge 50 Series, a box truck model operating in Europe
