This document discusses vectors and their properties. It defines a vector as a physical quantity that has both magnitude and direction, unlike scalars which are only specified by a single value. Velocities and forces are provided as examples of vector quantities. Vectors can be represented graphically as arrows or analytically with symbols and units. Key properties of vectors include how they can be added using the tail-to-head or parallelogram methods of vector addition. Rectangular coordinate systems are also introduced to graph vectors.