We communicate all the time-everyday. We put our ideas, thoughts and feelings into words. We talk. So many millions of words are spoken each day by people. Every one has ideas, information, thoughts, and feelings to share and tell.

Sometimes it takes too long to give information with words. That is why we have sings and symbols. They tell a lot of people the same thing at the same time. The siren of a fire engine tells you there’s a fire somewhere and you must get out of its way quickly. Traffic lights tell you to `stop’ or `go’. A flag at half-mast tells you that some important has died.

People also communicate quickly without speaking a single word. You knock at the door to find out if anyone is in the room and if you could go in. by raising your hand in class, you tell your teacher that you want to say something or ask or answer a question. Waving is a signal of `hello’ or ``goodbye’’. These are called gestures.