In Pittsburgh, Hacking the Night Away

The hour approaches midnight on the campus of Carnegie-Mellon University in Pittsburgh, but in Wean Hall, C.M.U.'s computer center, it might as well be high noon. On the fifth floor, two dozen undergraduates pound computer terminal keyboards, complete class assignments or work on research projects. In a glass-walled room two floors below, 20 students are seated at terminals. Down the hall from them, in a large room known as the SPICE rack (for a project called the Scientific Personal Interactive Computing Environment), several young men and women tap away on Wean Hall's most...

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