A very simple example is Yahoo mail and Gmail, both are using cloud computing.
When you send or receive email, you never need any application software installed in your computer. You just need an internet connection to send your emails.
Clouding computing is no more considered as an emerging technology. Now, it’s a reality and this low-cost computing power is gaining popularity among businessmen, especially medium and small size, and governmental organizations, as people are realizing the power of cloud environments.