41. The "'X Window System "'is a windowing system for MIT in 1984. 42. The program known as the X display manager shows the graphical login prompt in the X Window System . 43. In the X Window System , any data selected in an application is available to all other programs. 44. Most popular user interfaces are based on the X Window System , often simply called " X ". 45. New graphical desktop movements grew up around Linux and similar operating systems, based on the X Window System . 46. This led to the formation of the successful X . Org Server reference implementation of the X Window System . 47. In computing, the X Window System ( commonly : X11, or X ) is a bitmap displays. 48. In this condition, the DM realizes in the X Window System the functionality of character-mode terminals. 49. In the X Window System paradigm, the server runs on the computer providing the display and input devices. 50. Although SFU includes X Window System client libraries and applications, it does not contain a native X server.