* Build some default contact providers - LDAP, OSX address book, Outlook, Google Contacts, Facebook, LinkedIn, SyncML connector, CardDAV connector, etc.
<b>6) Allow users to undo and redo changes to their contacts([https://TODO:FEATUREPAGE feature page]):</b> * The current address book does not allow users to recover from mistakes with undo / redo. This is a source of frustration, and potential data loss if the user accidentally deletes a contact. <b>7) Duplicate resolution and merging ([https://TODO:FEATUREPAGE feature page]):</b>
* It is likely that a user will have the same person represented across different contact providers. We should allow the user to merge these duplications into an integrated view, either manually, or via an automated process.
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