Why bother filing at all? Everything we know about the workplace suggests that few if any knowledge workers ever refer to documents again once they have filed them away, which should come as no surprise, since paper is a lousy way to archive information. It’s too hard to search and it takes up too much space. Besides, we all have the best filing system ever invented, right there on our desks—the personal computer. That is the irony of the P.C.: the workplace problem that it solves is the nineteenth-century anxiety. It’s a better filing cabinet than the original vertical file … The problem that paper solves, by contrast, is the problem that most concerns us today, which is how to support knowledge work. In fretting over paper, we have been tripped up by a historical accident of innovation, confused by the assumption that the most important invention is always the most recent. Had the computer come first—and paper second—no one would raise an eyebrow [at people using paper]