First the ancient Greeks hid secret messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked code. Now computers create codes no human can crack.
The fascinating facts about communication, from 'how does your body talk?' to 'is virtual reality just for fun?'.'
This book looks at seven different jobs including actor, camera operator and special effects artist, and explains what each job involves.'
What information is safe to share online? Why are screen names important? What are chat rooms and search engines? Look inside to find the answers to these questions and more. By learning a few rules, you can stay safe online.
Millions of kind across the country are discovering the Internet both in the classroom and at home. This easy to read ang colorful guide provides a history of 'the net', a description of its current uses, and a look into the future or worldwide networkin