1) Fixing code 2) Removing wiretaps 1) Pest control 
Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program or a piece of electronic hardware, thus making it behave as expected. Debugging tends to be harder when various subsystems are tightly coupled, as changes in one may cause bugs to emerge in another. Numerous books have been written about...
(from the article `computer program`) ...translators (either assemblers or compilers), which transform an entire program from one language to another; interpreters, which execute a ... ...product. Sophisticated techniques for testing software have therefore been designed. For example, a large software product might be deliberately ... ...
The process of rectifying errors in a computer program.
The process of finding, analyzing and removing the causes of failures in software....
The process of finding and removing programming errors.
Finding and fixing errors in programs.