We all know such applications as Microsoft Word or Excel. Internet applications are similar but with one difference namely, they are run in the Internet browser (like Mozilla Firefox, Google Chrome, etc.). In comparison to traditional desktop applications, the Internet ones have such advantages as:

• You do not have to install anything except for the Internet browser on user's computer.
• The idea of Internet applications contains the concept of co-operation - many people can work at the same time having access to the same data.
• Independence from the operating system - the Internet applications can, with no obstacles, work with Windows, OS X, Linux, iOS, Android, etc. What is important, it does not involve any additional costs.
• Thanks to Sencha's ExtJS library, our Internet applications look and behave in the same way as traditional desktop applications.

We only recently introduced websites to our offer, however with such technologies we have worked for many years. It is because these technologies recently became mature enough to cope with our imagination. Only after AJAX, HTML5 and CSS3 appeared we decided to create websites and Internet services seriously. As a result, the library CsJS emerged and such websites as www.codeton.pl, www.toncut.pl and biz.paseczek.pl are based on it. Modules we created for Shirix service are also based on CsJS.

There is nothing to hide but we do not deal with mobile applications for too long. Creating such applications gives us an opportunity to give full rein to our imagination to create something really cool.

A few years ago when said "a program" or "application" we meant just an ordinary program run on the desktop of our computer. Today we have Internet applications, mobile applications and... desktop applications (traditional?).

Desktop applications are applications run on the desktop of our computer. Until the Internet and mobile era came we had dealt with such applications for many years. We still can do this, as evidenced by Paseczek or TonCut.