Introduction

The history of personal computing is, to a large extent, a story of increasing the mobility of both hardware and data. With the original personal computers, the “personal” part referred not only to the idea of a computer that belonged to and could be used by a single person but also to the fact that, unlike its mainframe and minicomputer predecessors, the PC could be moved from one room to another. Truly portable PCs arrived just a few years later, and the past 30 years or so have seen PCs shrink to what will perhaps be the PC form factor’s smallest incarnation: the smartphone.

The smartphone is an amazing invention, but what it offers in terms of mobility it lacks in screen size. Yes, you can use a smartphone to compose an email ...

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