In Computing
- Host (network), a computer connected to the Internet or another IP-based network
- Hosts file, a computer file to be used to store information on where to find an internet host on a computer network
- host (Unix), a command-line Unix command
- Internet hosting service, a service that runs Internet servers allowing organizations and individuals to serve content to the Internet
- Virtual host, allowing several DNS names to share the same IP address
- Cross compiler host
- Terminal host, a multi-user computer or software providing services to computer terminals, or a computer that provides services to smaller or less capable devices
- Host machine, a computer that has a virtual machine running on it
- Web host, a computer or group of computers that make a website available to the world
- Homeland Open Security Technology (HOST), a project to promote the creation and use of open security and open-source software in the United States government and military
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