Cloud Computing

What is cloud computing?

It is difficult to come up with a precise definition of cloud computing.  In general terms, it’s the idea that your computer’s applications run somewhere on the “cloud”, that is to say, on someone else’s server accessed via the Internet.  Instead of running program applications or storing data on your own computer, these functions are performed at remote servers which are connected to your computer through the Internet or other connections.

In telecommunications, a “cloud” is the unpredictable part of any network through which data passes between two end points.  In cloud computing the term is used to refer generally to any computer, network or system through which personal information is transmitted, processed and stored, and over which individuals  have little direct knowledge, involvement, or control.

With more reliable, afford­able broadband access, the Internet no longer functions solely as a communi­cations network.  It has become a platform for computing.  Rather than running software on your own computer or server, Internet users reach to the “cloud” to combine software applications, data storage, and massive computing power.  A September 2008 Pew Internet and American Life Study found that 69% of online Americans have utilized some form of cloud computing.

It’s interesting to note that cloud computing is really nothing new.  It's the modern version of the 1960’s-era computer timesharing model.  That model was based upon the high cost of computers at that time.  With computer and data storage prices plummeting, it seems odd that there would be a return to that sort of model.

from: http://www.pewinternet.org/Reports/2008/Use-of-Cloud-Computing-Applications-and-Services.aspx.