An instance of me is a simple record of a pointer to another Link. I am an abstract class; my concrete subclasses, for example, Process, can be stored in a LinkedList structure.

	accessing	top
	nextLink Answer the link to which the receiver points.
	nextLink: Store the argument, aLink, as the link to which the receiver refers. Answer aLink.

	instance creation	top
	nextLink: Answer an instance of me referring to the argument, aLink.