Usability means the how easy to use and how easy as it is to learn something. The term is commonly used in computer and internet technology.
utility
Usability is usually a term used in the Software Industry describing how usable (easy to use) is something to the end user.
"Usability is a term used to denote the ease with which people can employ a particular tool or other human-made object in order to achieve a particular goal. Usability can also refer to the methods of measuring usability and the study of the principles behind an object's perceived efficiency or elegance."
System usability scale was created in 1986.
Usability Professionals' Association was created in 1991.
The Chambers Dictionary says usable.
The author of 'Prioritizing Web Usability' is Jakob Nielsen. Nielsen, a usability consultant, was born in Copenhagen, Denmark in 1957. He holds a Ph. D. in human-computer interaction.
One can perform a website usability test on various websites like optimizely and VisualWebsite. Both websites offer a test to perform a websites usability and can be done for free.
usability is the quality of being able to provide good service. and utility is the state of being useful
Usability
The mathematical term for "mean" is "mean".The popular, or colloquial term for "mean" is "average".
You can get a guaranteed, professional Usability Test for your website for a very low price from AIMS Advanced Internet Marketing Strategies: http://www.aims.co.il/website-usability-test.html You will receive detailed reports and a video of user's screen movements and comments for review.