A server process (program) fulfills the client request by 
performing the task requested. Server programs generally 
receive requests from client programs, execute database 
retrieval and updates, manage data integrity and dispatch 
responses to client requests. Sometimes server programs 
execute common or complex business logic. The server-based 
process "may" run on another machine on the network. This  
server could be the host operating system or network file 
server; the server is then provided both file system 
services and application services. Or in some cases,
another desktop machine provides the application services. 
The server process acts as a software engine that manages 
shared resources such as databases, printers, communication 
links, or high powered-processors. The server process 
performs the back-end tasks that are common to similar 
applications.