This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

sec 

        # Time.sec

(from ruby core)
---
    time.sec -> integer

---

Returns the second of the minute (0..60) for *time*.

**Note:** Seconds range from zero to 60 to allow the system to inject
leap seconds. See https://en.wikipedia.org/wiki/Leap_second for further
details.

    t = Time.now   #=> 2007-11-19 08:25:02 -0600
    t.sec          #=> 2

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.