Transcription: Information in Learn Your PC is presented in a highly structured manner and is organized into a tree-like structure. The root menu is the starting point from which you can enter one of the three sections of the learning course, basics, hardware, or software, or enter the glossary. Within a section, you may move up or down the tree of contents in order to access more detailed information. An information unit consists of an interactive text with illustrations and occupies exactly one screen. There are two types of screens in the first tree, nodes and leaves. A node is a screen from which you can ...