Rutan Host, a fictional extraterrestrial race from the British science fiction television series Doctor Who
In computing:
Network host, in computer networking, a computer connected to the Internet
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. Example: Xhost.
Hosts file, a file that serves to look up Internet Protocol addresses
Smart host, a type of mail relay server which allows an SMTP server to route e-mail to an intermediate mail server
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