Millions of files consigned to paper shredders in the late days of the East German regime will be pieced together by computer. The massive job of reassembling this puzzle from the late Cold War was performed, until now, by hand.

It's been years in the making, but finally software designed to electronically piece together some 45 million shredded documents from the East German secret police went into service in Berlin on Wednesday. Now, a puzzle that would take 30 diligent Germans 600 to 800 years to finish by hand, according to one estimate, might be solved by computer in seven.