In several dozen nondescript office buildings around the world, thousands of hourly workers bend over table-top scanners and haul dusty books into high-tech scanning booths.

• 在全球几所看起来普普通通的办公大楼里，上千工作人员俯身在台式扫描仪前，把尘封已久的书籍拖出来，用高科技的仪器扫描。