Complex sentence: Robots need to manipulate objects; pick up, modify, or otherwise have an effect.Thus the "hands" of a robot are often referred to as "end effectors", while the "arm" is referred to as a "manipulator".
Split into simpler sentences: Robots need to manipulate objects; pick up, modify, or otherwise have an effect. Beverley K Thus the "hands" of a robot are often referred to as "end effectors", while the "arm" is referred to as a "manipulator".