Mailing-lists are a great way to keep your finger on the pulse of the Ruby community.
Ruby has four primary English speaking mailing lists:
- Ruby-Talk
 - This is the most popular mailing-list and deals with general topics about Ruby. (Archives, Posting Guidelines, Community Archive)
 - Ruby-Core
 - This list deals with core and implementation topics about Ruby, often used to run patches for review. (Archives)
 - Ruby-Doc
 - This list is for discussing documentation standards and tools for Ruby. (Archives)
 - Ruby-CVS
 - This list reports all commits to Ruby’s Subversion repository.
 - The comp.lang.ruby Newsgroup
 - Those who prefer Usenet over mailing lists will want to checkout the comp.lang.ruby newsgroup. (FAQ)
 
Subscribe or Unsubscribe
See https://ml.ruby-lang.org/mailman3/lists/ for more information about all mailing lists on ruby-lang.org, including the lists in Japanese language.