body language - changes in your body movements to show what you are feeling or think., wireless system WIFI - technology which is in a computer and a network installed in a building. which means that people don't have to plug their computers into the internet., laptop computer - small computer that you can carry with you, mobile phone - phone that you can carry with you and use in any place., e-mail - electronic mail - a system that allows you to send and receive messages by computer., blog - online diary. people can read the diary and comment or ask questions to interact with the writer, video diary - like a blog but with a video rather than words, text messaging - send someone a written messages on a mobile phone, social networking site - a site that people can join and ask others to be guests or friends on their website . each guest then bring their own friends onto the network.,

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