Binary bonding

Binary bonding is a process in which a Transformer enters into a symbiotic relationship with a smaller being (usually organic, often an Earthling or a Nebulan) who has been augmented with the ability to transform into a component or weapon.

The Transformers cartoon
The Headmasters' heads would be modified with an interior control panel where their partner could sit and manually control the movements of the Transformer, if the Transformer allowed it. Binary bonded Headmasters may "feel like they are part of each other", but otherwise communicate by speaking to each other normally.

Foreign names

 * Japanese: Binary-bond (バイナリーボンド Bainarī bondo)