This document discusses different Ruby implementations and provides tips for learning Ruby. It begins by explaining what an EGOT is and listing several Ruby implementations. It then provides advice to read as much code as possible when learning Ruby. The rest of the document dives into various Ruby objects and implementations, providing code snippets and suggestions for how to learn and contribute to different Ruby engines like MRI, JRuby, Rubinius, MacRuby, Topaz, and MagLev. It emphasizes learning as many Ruby implementations as possible to become a better Ruby programmer.