There are four kinds of users with additional powers on Wikipedia - patrollers, moderators, administrators and bureaucrats. * Patrollers have the power to roll back edits with just one click and mark edits as patrolled. * Moderators have the power to roll back edits with just one click and mark edits as patrolled. * Administrators have the power to - in addition to the powers of a moderator - delete pages, protect pages and ban users from the wiki. * Bureaucrats differ from regular administrators in that bureaucrats can give and revoke other people's administrative powers.