What is host operating system? - Definition from Whatis.com

Definition

host operating system

A host operating system (OS) is the original OS installed on a computer. Other operating systems are sometimes installed on a computer, in addition to the host OS, as guest operating systems. For the purposes of disk partitioning, a guest OS must be the same as the host OS. In virtualization, however, a guest OS can be a different from the host.

This was last updated in November 2007

Dig Deeper

  • Two VMware cloud partnerships reemerge: News in review

    VMware's cloud partnerships with Salesforce.com and Google will be in the spotlight at its upcoming SpringSource developer conference, SpringOne 2GX.

  • VMworld 2010 diary: Tuesday

    Eric Siebert weighs in on the keynotes by Paul Maritz and Stephen Herrod, plus the Best of VMworld 2010 Awards judging, in the Tuesday edition of his VMworld 2010 diary.

  • VMworld 2010 diary: Monday

    Eric Siebert discusses his VMworld 2010 sessions on affordable home labs and how virtualization works in the Monday edition of his VMworld 2010 diary.

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com