Server (computing), a computer that provides services to other computers, or the software that runs on it
Application server, a server dedicated to running certain software applications;
Communications server, carrier-grade computing platform for communications networks;
Database server, provides database services;
Fax server, provides fax services for clients;
File server, provides file services;
Game server, a server that video game clients connect to in order to play online together;
Standalone server, an emulator for client-server (web-based) programs;
Web server, a server that HTTP clients connect to in order to send commands and receive responses along with data contents.;
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Client-server, a software architecture that separates "server" functions from "client" functions
The X Server part of the X Window System;
Peer-to-peer, a network of computers running as both clients and servers;
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