1. 
   usability
   The capability of the software to be understood, learned, used and attractive to the user when used under specified conditions.
   Found op http://www.testingstandards.co.uk/living_glossary.htm
   
   
2. 
   usability
   A quality attribute that assesses how easy user interfaces are to use (according to Jakob Nielsen, www.useit.com/alertbox/20030825.html). It is defined by five quality components: learnability, efficiency, memorability, errors, satisfaction. See also accessibility.
   Found op http://www.techscribe.co.uk/techw/glossary.htm
   
   
3. 
   usability
   (programming) The effectiveness, efficiency, and satisfaction with which users can achieve tasks in a particular environment of a product. High usability means a system is: easy to learn and remember; efficient, visually pleasing and fun to use; and quick to recover from errors. (http://orrnet.com/...
   Found op http://foldoc.org/usability
   
   
4. 
   Usability
   Usability is the ease of use and learnability of a human-made object. The object of use can be a software application, website, book, tool, machine, process, or anything a human interacts with. A usability study may be conducted as a primary job function by a usability analyst or as a secondary job...
   Found op http://en.wikipedia.org/wiki/Usability
   
   
5. 
   usability
   The capability of the software to be understood, learned, used and attractive to the user when used under specified conditions. [ISO 9126]...
   Found op http://www.imbus.de/glossar/
   
   

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