Preface

Everything we call real is made of things that cannot be regarded as real. Bohr, Niels

Niels Bohr

When most people think about computers, they consider laptops or maybe even bigger systems such as the servers that power the web, the Internet, and the cloud. If you look around, you may start seeing computers in other places. Modern cars, for example, have anywhere from around 20 computers to more than 100 to control all the systems that allow you to move, brake, monitor the air conditioning, and control the entertainment system.

The smartphone is the computer many people use more than anything else in a typical day. A modern phone contains a 64-bit processor, whatever a “64-bit processor” is. The amount of memory used for running all ...

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