14. How long does it take to spread technology?
Revision as of 08:58, 26 March 2005 by Lianzhuang Qu (talk | contribs)
Due to the globalization, the time of technology spread become shorter and shorter.
| Medium | # of years from inception to 50 million users |
|---|---|
| Radio | 38 |
| Personal Computers | 16 |
| Televsion | 13 |
| World Wide Web | 4 |
Source: Economist