Drone

Drones were robots used in the construction of settlements and bases on new planets. Robot drones constructed Bowie Base One when it was lowered in sections from orbit. (TV: The Waters of Mars)

Robot drones constructed buildings on the planet Messaline while the human and Hath settlers waited in their ship. When they finished construction, the settlers moved in shortly before fighting. (TV: The Doctor's Daughter)

A series of drones were modified by Davros. (PROSE: An Incident Concerning the Continual Bombardment of the Phobos Colony)

In the mid-20th century, the Cybermen of Mondas used caterpillar-like creatures which Ace identified as drones. (COMIC: The Good Soldier)