User Acceptance Testing

Testing to verify that the product meets customer specified requirements. A customer usually does this type of testing on a product that is developed externally. There are 2 types of user acceptance testing:-
1) Alpha Testing :
End-user i.e., client or 3rd party person on beahlf of the client does this type of testing. It is not done by programmers or testers. Testing of an application when development is nearing completion minor design changes may still be made as a result of such testing. In this, the client or 3rd party person tests the software before completion at our site (where software is developed).
2) Beta Testing :
When the Client tests the software at their own site or company it s called beta testing.