These days， it is not unusual for 10﹣ to 12﹣year﹣olds to publish their own websites or for second and third graders（1） 　　（begin） computer classes. At the same time，computer games are becoming increasingly popular as major publishing houses continue to develop（2） 　　（education） computer programs for children in preschool. Also， technological know﹣how has become a（3） 　　（require） for most jobs in an increasingly digital world， as the computer has become a common tool in most（4） 　　（profession）.

The Digital World is a set of volumes（5） 　　aim to describe how digital systems influence society and help readers understand the nature of digital systems and their many interacting parts. Each volume in the set explores（6） 　　wide range of material，explains the basic concepts of major applications of digital systems，（7） 　　discusses the influences they have on everyday life. Because the number of possible topics（8） 　　（be） practically limitless， we focus on a sample of the most interesting and useful applications and tools and explain the basic principles of technology. Readers（9） 　　（encourage） to continue exploring the digital world with the guidance of（10） 　　（we） Further Resources section featured in each volume.