I type this comment flanked by my shelves of computer books. Most I keep for sentimental or historical value. My first edition K&R, the first PostScript Red Book, the volumes of The Art of Computer Programming, and many animal books. In addition to what the author said, what saddens me is that most developers today will not have these milestones of their growth as a software engineer to look back upon. Our history is literally evaporating into the cloud.