Droid

Droids is a designation given to sapient mechanical life forms widely employed as a work force by the Galactic Empire.

Biology
Droids come in multiple shapes and sizes, and are usually made to perform tasks which would be physically or intellectually unsuitable for most organics. While some can communicate with their makers, others aren't able to speak any language other than computerized sounds, and thus require translation from others who can understand them, such as protocols droids like C-3PO.

Due to their artificial, metallic structure, Droids are among the few sapient life forms to be completely unconnected to the Force.

Culture and society
In spite of their obvious sapience and sentience, Droids are treated as property by organic races and have no legal rights of their own.