. "symmetric (in-order) traversal" . . . "pre-order traversal" . "search tree" . "Rooted tree" . . "Tree traversal#In-order, LNR" . . "traversing" . "pre-order" . "Tree_traversal#Applications" . "breadth-first-search" . "Recursively traverse" . "search strategies" . "Tree traversal" . "Traversals" . "Tree traversal#Pre-order%2C NLR" . . "tree traversal" . "Tree traversal#Morris in-order traversal using threading" . "level-order" . . "inorder traversal" . "walking the tree" . . "traversed" . "post-order traversal" . "Tree traversal#Post-order%2C LRN" . "tree walk" . "traversals" . "tree search algorithm" . "Tree traversal" . "preorder" . . . "post-order" . "tree traversers" . "traversalness" . "In-order traversal" . "infix numeration" . . "Tree traversal#Post-order (LRN)" . "tree search" . . "traversal" . "in-order traversal" . "in-order" . . "graph traversal" . "Tree traversal#Inorder traversal" . . . .