Maple Professional - Version 7.3 Maple Professional is the flagship of the tree outline ma nagers for power users. It enables you to create hier archical trees for storing information such as docume nts, notes, and images. You can create unlimited nodes an d sub-nodes and assign any document to each node. Docu ments can be loaded from file and saved in .rtf, .t xt, .doc, .wri, or .html format. You can easily create a backup copies of your trees with a backup system. I f you have confidential documents, which you want to encrypt, you can use built-in file encryptor. If you ha