The word ‘server’ refers to a specialized computer or hardware on which the server software works and provides services to other computers or clients. A server has many functions, and they come in different types to facilitate different uses.
A server is a device with a particular set of programs or protocols that provide various services. Together, a server and its clients form a client/server network, which provides routing systems and centralized access to information, resources, stored data, etc.
Other types of servers include Open source servers, Gopher server (like a plain document, similar to WWW and the hypertext being absent), and Name server (applies name-service protocol).
The various servers can be categorized according to their applications. Servers along with managing network resources are also dedicated, i.e., they perform no other task other than their server tasks.