Trie Memory CACM September, 1960 Fredkin, E. CA600902 JB March 20, 1978 8:50 PM 155 5 155 155 5 155 155 5 155 944 5 155 2846 5 155 849 5 155 155 6 155 155 6 155 155 6 155 615 6 155