The computer, I began to sense, was more than just a simple tool that did what you told it to do. It was a machine that, in subtle but unmistakable ways, exerted an influence over you. The more I used it, the more it altered the way I worked. At first I had found it impossible to edit anything on-screen. I’d print out a document, mark it up with a pencil, and type the revisions back into the digital version. Then I’d print it out again and take another pass with the pencil. Sometimes I’d go through the cycle a dozen times a day. But at some point—and abruptly—my editing routine changed. I
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