Let's take a tour of your teeth. Look in the mirror at your own teeth or check out a friend's smile. The part of the tooth you can see, which is not covered by the gum (your gums are the pink, fleshy part), is called the crown.
Factory Acceptance Testing. Testing by a manufacturer of a particular product to validate its conformance to performance specifications and ratings. Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001).
System and Acceptance Testing. The software application is integrated into the overall product and is tested to show that all requirements are met. The acceptance testing, on the other hand, is very similar to the system test. However, in commercial software, this is the test upon which acceptance of the completed application is based. This is often witnessed by the customer(s) for the application package.