What term describes a computer that hosts applications accessible to user workstations?

The term that accurately describes a computer that hosts applications accessible to user workstations is "Application Server." An application server provides a platform for applications to run and makes these applications available to client machines over a network. It handles business logic, processes requests from clients, and typically manages interactions with databases, ensuring that users can access and use software applications effectively.

In this context, the other terms represent different functions in a computing environment. A database server is dedicated to managing databases and serving database queries, while a virtual machine refers to an emulation of a computer system, which runs an operating system and applications as if it were a physical computer. Finally, a file server is focused on storing and managing files, providing access to those files for users on the network, but it does not host applications. Each of these components plays a crucial role in IT infrastructure, but the application server is specifically designed to host and manage applications for user workstations.