Test cases
            It is the step by step description of the 
action that we do during the testing.

Test script
     Type of test file. It is a set of instructions run 
automatically by a software or hardware test tool.

Test suite or secnario
        Is the collection of test cases.
Test plan
      Is a document that describes the objective, scope and 
the approch of the testing. This document has time 
scheduling the teesting activities, and what is assigned to 
whom.