Resources

• Use built-in help of Emacs
• Sacha Chua's writing about Emacs
  http://sachachua.com/blog/category/emacs/
• An introduction to programming in Emacs Lisp
  https://www.gnu.org/software/emacs/manual/html_mono/eintr.html
• [To be updated]
  

Advanced

• Accessing OS env, terminal inputs & outputs, timers, idle timers, etc.
  https://www.gnu.org/software/emacs/manual/html_node/elisp/System-Interface.html
• [To be updated]