Cloud computing is when you access online programs provided by service companies. It allows you to use and access your data from any computer, anywhere. Many people use it because, although they may pay a monthly access fee, it is more cost effective than personally purchasing the programs, and updates. They also don't have to worry about losing data, if their own computer crashes, The simplest form of cloud computing is the Internet-based email programs, such as Yahoo mail, and Hotmail. Hotmail account holders can also access limited use of cloud versions of Microsoft Office programs.