6.1 Binary trees and binary search tree 6.2 Inorder, preorder, and postorder tree walk 6.3 Successor and predecessor of BST 6.4 Operations of BST: search, Minimum and maximum, constructing, deletion and insertion 6.5 Balanced search trees 6.6 AVL trees 6.7 Single and double rotation 6.8 Red-black trees 6.9 B-tree (2-3-4 tree)