In a Vector scan display, both magnitude and direction of the electron beams are used to create a display. Display programs having the co ordinates of the screen are stored in Refresh Buffer Memory. A display controller is used for interpretation commands for the co ordinates and sends it to a vector generator. Vector generator then converts digital co ordinates in to analog voltages which is then passed to the Cathode Ray Tube for display. This process is repeated continuously to obtain a display.