Comment 2 for bug 437568

File: applications/playdeb/views/updates.html
  Add some link or other interface element to provide the "Sort by alphabet" function
  Such link would reference something like:
  ${base_url}/updates/Ubuntu/${updates_release}/?alpha=letter
  When alpha is provided the html template must also take care of providing the alphabet based links instead of the page numbers on the navigation section.

File: base/controllers/updates.py
Update the controller code to handle the alpha parameter

File: base/modules/packages.py (* this is the more complex part*)
Extended the get_applications_list function to support the alpha parameter or create a new get_applications_list_alpha, this will require new SQL and related code.