1.   The internal part of the mid-section was also pressurized and contained the guidance computer and the environmental control system.

2.   Also Wednesday, Mir commander Anatoly Solovyev and cosmonaut Pavel Vinogradov installed a new guidance computer on Mir.

3.   Atlantis is scheduled to reach Mir late Saturday with nearly three tons of supplies, including a replacement guidance computer and U.S. astronaut David Wolf.

4.   A computer glitch shut off the guidance computer last week, sending the aging Russian space station into an uncontrolled drift.

5.   A week later, the guidance computer delivered by Atlantis in October was replaced with the device from Progress when a signal relay component faltered.

6.   Meanwhile, the primary guidance computer has faltered three times since a major repair in early October.

7.   No one returned, and critical guidance computers, power storage batteries and thermal control systems began to falter.

8.   The company also developed the guidance computer for the Apollo spacecraft.

9.   The shuttle crew delivered fresh water, storage batteries and a new guidance computer.