This document discusses kinematics, which is the analytical study of motion geometry without considering forces. It describes how the motion of an open chain manipulator can be represented by a kinematic chain of rigid links connected by revolute or prismatic joints. The resulting motion is obtained by composing the elementary motions of each link relative to the previous one. Closed kinematic chains are more difficult to analyze as they must account for constraints from other links and statics. The document also covers topics like mapping between frames, composite transformations, and direct kinematics using transformation matrices.