Usability is defined by a product being easy to use, easy to learn and easy to remember.
The user s satisfaction when using a product, is another important usability factor. Most important, however, is the question whether or not the product efficiently solves the task it is designed for. The researchers who work at the laboratory have a multi-disciplined background such as informatics, psychology, social science and engineering. IT applications for disabled persons Information technology can be used by disabled persons to compensate for various loss of functions. Information technology is becoming an integrated part of many technical aids, for instance electric wheelchairs and alarm and signalling aids.