Publisher Advertisement Just 55 hours ago, 5.3 million pounds of thrust from two solid fuel boosters sent the Space Shuttle Columbia into orbit. Now, on-board computers performing 325,000 separate operations every second will help guide the Columbia safely and gracefully home to Earth. Instant Software's SPACE SHUTTLE puts you in the command pilot's chair of America's first reusable space vehicle. And, until commercial space flight becomes a reality, this is the closest you'll get to the Ultimate Flight.