References:

1)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwjtl6qd6fjKAhUCWY4KHVHmCIQQjhwIBQ&url=http%3A%2F%2Fwww.clipartpanda.com%2Fcategories%2Fmail-clipart&psig=AFQjCNFHUkF4Bw8rT_ag2e8Ac8uMru9QsA&ust=1455593045027627&rct=j

2)https://www.timetoast.com/timelines/how-communication-has-changed-over-time

3)http://www.crbm.cnrs.fr/index.php/en/science-communication

4)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwiC16vG6fjKAhUMcI4KHRIsCYQQjhwIBQ&url=http%3A%2F%2Fwww.sparkmuseum.org%2Fcollections%2Felectricity-sparks-invention-(1800-1900)%2Fthe-first-dial-telephone%2F&psig=AFQjCNHIlb3g4dzWePv2AfmRAYY0Wt6Mbw&ust=1455593238037487&rct=j

5)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwjX7p_d6vjKAhUPBo4KHXyiD4gQjhwIBQ&url=http%3A%2F%2Fwww.missscotties.com%2FDefault.aspx%3Ftabid%3D974686&psig=AFQjCNGETsslK3rhvyqAIm2LH9F2quUgyg&ust=1455593426757935&rct=j

6)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwjgy4u96_jKAhWCHY4KHVXZDXEQjhwIBQ&url=http%3A%2F%2Fglobalmoxie.com%2Fblog%2Feves-portable-wireless-phone.shtml&psig=AFQjCNHFNtlger6deQwt6QprbkVwRK8w0Q&ust=1455593765876637&rct=j

7)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwiCm6fQ7PjKAhWBG44KHS9eCnkQjhwIBQ&url=http%3A%2F%2Fwww.digitaltrends.com%2Fcomputing%2Fhow-to-send-free-text-messages-online%2F&psig=AFQjCNGL3Jh8hXiNFL1mVhpFcuMAWy778A&ust=1455594032517516&rct=j

8)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwjP5t6g7fjKAhVHno4KHei5A4gQjhwIBQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FBluetooth&psig=AFQjCNEXFb31qZ0Q96uWgWoSAQzKbnsWtQ&ust=1455594226406594&rct=j

9)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwiFmLSp7vjKAhXHwI4KHW1SAHIQjhwIBQ&url=http%3A%2F%2Fwww.glbrain.com%2Findex.php%3Fr%3Dtool%2Fview%26id%3D23881%26toolType%3D4&psig=AFQjCNEU8UlEHFuJEUJaM94i9Lpo7phKlQ&ust=1455594491168602&rct=j

10)https://www.google.com.my/url?sa=i&source=images&cd=&ved=0ahUKEwiC9Ibw7vjKAhWFbY4KHZ5lBYQQjhwIBQ&url=https%3A%2F%2Fsupport.apple.com%2Fen-us%2FHT204380&psig=AFQjCNG5NSu-0wIpAc0iGW99Pj3FCrzBcw&ust=1455594661266972&rct=j