Ruby on Rails RoR, Controllers, Sessions,
Filters, Cookies, Data Streaming, Routing, Mind Map
including convention over configuration (CoC), don't repeat yourself (DRY), and the active record pattern.
Source: Wikipedia: Ruby on Rails.
Ruby on Rails is used
in building web applications, social networking sites, cloud storage
Mind map based on
Graphic organizers are visual
representations of knowledge, concepts or ideas.