Garbage collection algorithms can be used for other thinks than pure memory management. Each time you have dependencies between objects and want to remove some

Garbage collection algorithms can be used for other thinks than pure memory management. Each time you have dependencies between objects and want to remove some objects which are not useful any more, you can use a similar algorithm to make a clean up function which has a visible impact for the user of the software. (example: removing points not used by any shape in a drawing software)