What is Testing a Software ?

I have to start this blog with this basic question , as I titled what is testing a sw ...This consumes more than 75% of the time sheets filed across in the IT induztry, But I as a tester would spend time in preparing what to test and there is another Humane who is already evaluated his peice of work and this comes to a full throttle test to another to show is effectiveness of his work he is a tester.

I answer this question with my purview as " IS A DIFFERENCE BETWEEN THE DEVELOPERS UNDERSTANDING OF THE REQURIEMENTs TO THAT OF A TESTERS" this the most easiest way i feel of what software Testing is all about. Well there are process to define how its to be done and at different phases from 1st Gear to 5th Gear with different names ,, I will shower some more ideas on what will happen when testing is started in different types of softwares in this world.