Many websites, web applications, desktop applications, documents, and apps present obstacles of various kinds to people with disabilities. IT accessibility seeks to remove obstacles to ensure equal and unrestricted use.

Users should be able to easily navigate web pages, as well as easily perceive and operate elements, just like users without interference. It is very important to build understanding for the different needs of people with different impairments. Only when these needs are perceived and taken into account, an effective and efficient use for each user is guaranteed.

For example, for blind users, the interaction between the system and the reading software has to take place without difficulty. For people with visual impairments, good contrasts must exist.

In summary, this means that there are different laws and guidelines for the design of barrier-free systems that should be taken into account when creating accessible systems.