View source for 14. How long does it take to spread technology?

Due to the globalization, the time of technology spread become shorter and shorter.
<center><table border=2 cellpadding=3 cellspacing=2>
<tr><th>Technology</th><th>Number of years from introduction to 50 million users</th></tr>
<tr><th>Radio</th><td align=center>38</td></tr>
<tr><th>Personal Computers</th><td align=center>16</td></tr>
<tr><th>Televsion</th><td align=center>13</td></tr>
<tr><th>World Wide Web</th><td align=center>4</td></tr>
  
</table></center>
http://www.globalpolicy.org