Some statements were direct equivalents to VDU codes, such as CLS for VDU 12. Along with Talgat Musabayev, the two removed Mir's VDU. There are two processes of distillation&colon; CDU process and VDU process. The spacecraft was modified to transport the first VDU propulsion unit to Mir. Modern signal boxes tend to be provided with VDU based, or similar, control systems. He and Musabayev completed the new VDU installation. The crew repaired the Spektr solar panel and installed a new VDU station orientation system. VDU 17 sets the text colour and 18 the graphics colour. The VDU was designed to increase the station's attitude control capability. VDU 2 and 3 toggle whether screen output is echoed to the printer. VDU 31 locates the text cursor to the location held in the following two bytes. VdU supported the abolition of denazification laws limiting the political activities of former Nazis.