What is Reverse Engineering?
Have you ever noticed, Nokia or Iphone made an application and after few days you find that on Samsung or any other mobile device. Its nothing that difficult, its called reverse engineering. They decode their programs to get the basic structure of the original program and then following the structure codes their own and sometimes doesn't even happen just make some code changes and uses them.
According to Wikipedia "Reverse engineering is the process of discovering the technological principles of a device, object or system through analysis of its structure, function and operation. It often involves taking something (e.g., a mechanical device, electronic component, biological, chemical or organic matter or software program) apart and analyzing...