- A user can log in
- A user has a profile page
- A user can see others' profile pages with all their updates
- A user can post status updates
- A user can only post status updates of 140 characters or less
- A user can see others' profile pages
- A user can follow other users
- A user can see a list of who they are following
- A user can see updates from those they are following
- A user has followers
- A user can see a list of their followers
- A user sees a responsively styled site
- A user can retweet others' status updates