These are pages that are fully protected permanently, meaning only sysops can edit them. Generally, they are protected for technical or legal reasons and should not be edited by anyone, even sysops, without very good reason.
The talk pages of these pages should not be protected. Changes to these pages may be discussed on their relevant talk pages.
Note that actual content pages (articles) should not be permanently protected in any way.
More protected pages can be found at Category:Protection.