The term "related purposes" is a broad and general phrase that can refer to various activities or goals that are connected, interconnected or share some commonality. It typically implies that there is a relationship between these different purposes, but it may not specify exactly what those relationships are. The specific meanings of the phrase will depend on the context in which it is used, and could range from something as simple as using resources for multiple tasks to more complex concepts such as pursuing goals that support or advance each other.