An application has a more narrow definition than an information processor. An application must serve the user. For instance, if you wrote a piece of software t

An application has a more narrow definition than an information processor. An application must serve the user. For instance, if you wrote a piece of software that converts LaTeX documents into HTML upon request, I would not consider that a web application. As I take it, it would meet the definition of an information processor, however. If you built a full accounting system that presents its user interface in a web browser, I would consider that a web application. The scope is quite different.