After looking in the online table of contents and index and seeing absolutely no mention of Kaypro Corporation (aka Non-Linear Systems) I would never buy this book! Kaypro introduced the first successful hard-disk portable, the Kaypro 10. They also introduced the world's first true laptop, the Kaypro 2000. Not even to mention the original Kaypro 2, one of the very first successful portables, which was so successful that it helped put Osborne out of business! Also not to mention that Kaypro introduced the very first IBM PC/AT (286) clone, at a fraction of the cost of the IBM. If these facts don't qualify them as a significant pioneer computer company, I don't know what does.