Wikibooks:Autoreviewed users
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Autoreviewed users are a group of users that solely have their own edits automatically marked as reviewed (autoreview). Unlike reviewers, autoreviewed users do not have the technical ability to review edits or pages.
Any Wikibooks administrator may grant this permission (at their discretion) to users who make a lot of good edits that do not require reviewing, or it may be requested at Wikibooks:Requests for permissions.
For autoreviewed users who later receive the reviewer permission, the autoreviewed user permission may be taken away. However, note that you won't lose anything, as the reviewer permission is a subset of the autoreviewed user permission.
There are currently 84 autoreviewed users on the English Wikibooks.