The relations could definitely be made more clear, but if you could point out what specific terms you find unrelated, I could explain how they fit together. The

The relations could definitely be made more clear, but if you could point out what specific terms you find unrelated, I could explain how they fit together. The basic organization is working up the ladder of abstraction; for example, scheduling is a fundamental concept, so it comes before other concepts that rely on it (which is all of them).