Operations occurring on the server side of a client-server system in computer networking.
In most cases, a server is a computer program, such a as a web-server, that runs on a remote server and is reachable from a user’s local computer.
Operations performed in this relationship can be done server-side because they require access to information and functions unavailable to the client or are unreliable if done client-side.
An example of a server-side operation would be CGI (Common Gateway Interface) scripts on the web because they run on a web-server.
In contrast, JacaScript sprits are client-side because they are executed by the user’s browser (the client).