Web Applications

Users can purchase application software from a software vendor, retail store, or Web-based business. Users typically install purchased application software on a computer before they run it. Installed software has two disadvantages: (1) it requires disk space on your computer, and (2) it can be costly to upgrade as vendors release new versions. As an alternative, some users opt to access Web applications.

 As previously mentioned, a Web application, or Web app, is a Web site that allows users to access and interact with software from any computer or device that is connected to the Internet. Users often interact with Web applications, directly at the Web site, referred to as the host, through their Web browser. Some Web sites, however, require you download the software to your local computer or device. Web application hosts often store users' data and information on their servers, which sometimes is called cloud storage. Users concerned with data security may shy away from this type of Web application. Thus, some Web applications provide users with an option of storing data locally on their own personal computer or mobile device.

 Many of the previously discussed types of application software are available as Web applications. In addition, thousands of games are available as Web applications.

 Many Web application hosts provide free access to their software, such as Google Docs. Others, such as Google Earth, offer part of their Web application free and charge for access to a more comprehensive program. Some Web applications, such as online tax preparation programs, allow you to use the Web application free and pay a fee when certain action occurs. For example, you can prepare your tax return free, but if you elect to print it or file it electronically, you pay a minimal fee.

 Experts often use the term Web 2.0 to describe Web applications. Recall that Web 2.0 refers to Web sites that provide users with a means to share personal information, allow users to modify Web site content, and/or have application software built into the site for visitors to use.