multi-paradigm: object-oriented, imperative, functional, reflective
Developer Yukihiro Matsumoto, et al.
Stable release 2.1.1 / February 24, 2014
Scope lexical, sometimes dynamic
Ruby MRI, YARV, Rubinius, MagLev, JRuby, MacRuby, RubyMotion, HotRuby, IronRuby, mruby
Ada,  C++,  CLU,  Dylan,  Eiffel,  Lisp,  Perl,  Python,  Smalltalk 
D,  Elixir, Falcon, Fancy,  Groovy, Ioke,  Mirah, Nu,  Reia
Ruby License or BSD License  
filename extensions .rb, .rbw
Ruby Programming at Wikibooks
Ruby is a language in text used to tell machines what to do - a programming language. Ruby was created in the mid-1990s by Yukihiro "Matz" Matsumoto in Japan.
It looks like the English language, like the language you are reading now. It has more
Terse. Short, but still easy to understand.
Dynamic. Easy to change, any time and any where.
Duck typing. If you think you understand it, you probably understand it.
Many programmers like it because the creator tried to make it easy and nice to use.
↑ 1.0 1.1 1.2 Cooper, Peter (2009). Beginning Ruby: From Novice to Professional. Beginning from Novice to Professional (2nd ed.). Berkeley: APress. p. 101. ISBN 1-4302-2363-4. "To a lesser extent, Python, LISP, Eiffel, Ada, and C++ have also influenced Ruby."
↑ 2.0 2.1 2.2 2.3 2.4 2.5 Bini, Ola (2007). Practical JRuby on Rails Web 2.0 Projects: Bringing Ruby on Rails to Java. Berkeley: APress. p. 3. ISBN 1-59059-881-4. "It draws primarily on features from Perl, Smalltalk, Python, Lisp, Dylan, and CLU."
↑ Intro – D Programming Language 1.0 – Digital Mars
↑ Bertels, Christopher (23 February 2011). "Introduction to Fancy". Rubinius blog. Engine Yard . http://rubini.us/2011/02/23/introduction-to-fancy/ . Retrieved 2011-07-21.
↑ Bini, Ola. "Ioke". Ioke.org . http://ioke.org/ . Retrieved 2011-07-21. "inspired by Io, Smalltalk, Lisp and Ruby"
↑ Burks, Tim. "About Nu™". Programming Nu™. Neon Design Technology, Inc. . http://programming.nu/about . Retrieved 2011-07-21.
↑ COPYING in Ruby official source repository
↑ BSDL in Ruby official source repository
↑ "About ruby" . . http://www.ruby-lang.org/en/about/