In engineering and its various subdisciplines, acceptance testing is a test conducted to determine if the requirements of a specification or contract are met. It may involve chemical tests, physical tests, or performance tests.
http://en.wikipedia.org/wiki/User_acceptance_test#Types_of_acceptance_testing
http://en.wikipedia.org/wiki/System_integration_testing
http://en.wikipedia.org/wiki/User_acceptance_test#User_acceptance_testing
