22. ติดตอและติดตามเพื่อน
• Facebook – the largest social network
• LinkedIn - the world's largest professional network with
over 120 million members
• Google+ - allow you to hang out with others
• Skype – free call to others who are online
27. สรางไฟลรูปแบบตางๆ
• Prezi – presentation software
• WordPress – blog tool used by 60 million people
• Slideshare – share slides and documents
• Evernote - access notes from all devices
• Audacity - recording and editing sounds