Gopher
Gopher presents the internet as if it were all a part of a single directory system such as directories on a DOS machine or folders on a Mac.
Gopher has modest hardware requirements and is quite useful if you cannot load web pages at a tolerable speed.
The Gopher browser presents a multi-level hierarchy of menus, with the documents placed at the bottom level.
Gopher is not as amenable to browsing or navigation as the Web is. You can use Veronica (a menu item on Gopher) to do a keyword search.