影像來源/ TOM DRAPER DESIGN; left to right: NATIONAL INSTITUTE OF INFORMATION TECHNOLOGY, DAVID GREEDY, PHOTODISC, PHOTODISC (top row); PHOTODISC (all photographs in second row); PHOTODISC, PHOTODISC, MARK WARSCHAUER (third row); PHOTODISC, PHOTODISC, KEITH DANNEMILLER Corbis/SABA (fourth row); KEITH DANNEMILLER Corbis/SABA NATIONAL INSTITUTE OF INFORMATION TECHNOLOGY, PHOTODISC, PHOTODISC (fifth row); PHOTODISC, PHOTODISC, VIVIAN MOOS Corbis (bottom row)