A hash server, also known as a web server, is a computer program that stores and serves files over the internet. It is responsible for responding to requests from clients, such as web browsers, and providing them with the requested files. The term 'hash server' comes from the fact that it uses a hashing algorithm to store and retrieve files. A DINER is a restaurant that serves meals in a casual atmosphere. It typically offers a wide variety of dishes, including breakfast, lunch, and dinner.