[[!meta copyright="Copyright © 2007, 2008 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]]."]]"""]] It is possible to run multiple instances of the Hurd in parallel, on a single instance of Mach. Other than performance [[crosstalk]], they are essentially isolated. Practically, as many devices do not allow multiple non-[[cooperating|cooperation]] users, e.g., hard drive and network this is not currently possible. It can be overcome, however, by [[virtualizing|virtualization]] these problematic devices. When extra hardware is not available, it is possible to use a [[sub-Hurd|subhurd]]. # Etymology *Neighborhurd* is a pun on *neighborhood*, and a stance against hierarchies.