A remote computer is a computer to which a user does not have physical access, but which he or she can access or manipulate via some kind of computer network.
Remote desktop software allows a person to control a remote computer from another computer. There are many tools to remotely access the computers, such as SSH, Telnet clients, VNC, RemotePC, LogMeIn, TeamViewer, GoToMyPC, Remote Graphics Software etc.
References
Remote computer Wikipedia(Text) CC BY-SA