The notes get less and less as we are in sprints longer and longer. I will try to figure out a way to transfer the notes/diagrams without scanning etc. For now:

More Data Structures
Linked list – has a head and tail, with pointers from one list member to the next list member.
Graph  – is a network of an arbitrary number of connections.
Binary Tree – node with at most two children and one adult. The left value is less than the parent is less than the right child.