In very simple terms a web application is a program written for the web that is not a website, and often can thought of as an application, like an email client (Microsoft Outlook).
We have had experience in web applications since before the phrase became popular.
Our first web application was an application that allowed customers to design and print their own business cards and business stationery straight from the web, the application communicated with the digital printer to produce the right results every time.
No matter what your web application and what your needs, if anyone can do it on the web, we can.