This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Thread.to_s (from ruby core) --- thr.to_s -> string --- Dump the name, id, and status of *thr* to a string.
This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.