# Multiple Input/Output

Some components help handle data through multiple inputs and/or multiple outputs. These are often processing-type components such as the tMap.

If this requires a join or some transformation in one flow, you want to use the tMap component, which is dedicated to this use.

For further information regarding data mapping, see [Mapping data flows](https://help.qlik.com/talend/en-US/studio-user-guide/8.0/map-editor-interfaces).