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aptitude 0.2.14.1
--\ Installed Packages
  --\ admin - Administrative utilities (install software, manage users, etc)    
    --- main - The main Debian archive
  --- base - The Debian base system
  --- devel - Utilities and programs for software development
  --- doc - Documentation and specialized programs for viewing documentation
  --- editors - Text editors and word processors
  --- electronics - Programs for working with circuits and electronics
  --- games - Games, toys, and fun programs
  --- gnome - The GNOME Desktop System

Packages in the 'admin' section allow you to perform administrative tasks such
as installing software, managing users, configuring and monitoring your system,
examining network traffic, and so on.