BB-series astromech droid

The BB-series astromech droid, also known as a 33 series astromech and often referred to as a BB unit, a ball droid, or a rollie, was a model of the astromech droid manufactured by Industrial Automaton and active during the era of the Cold War, featuring a spherical body that allowed the droid to roll in any direction, with a head usually atop the body but not meant to be permanently physically attached to it (which would inhibit the droid's ability to roll around). Like earlier astromechs, the BB unit could fit into the droid socket of a starfighter. One notable BB unit was BB-8, owned by the pilot Poe Dameron.

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