[[!meta copyright="Copyright © 2007, 2008, 2010 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] A persistent object is an object that survives reboot. On [[Unix]], files and directories are persistent but processes and [[unix/file_descriptor]]s are not. [[microkernel/EROS]] is an example of an orthogonally persistent system: processes and [[capabilities|capability]] also survive reboot. To a process, it generally only looks as if it had not been scheduled for a long time; the rest of its environment remains essentially the indistinguishable.