A time server is a computer that is responsible for providing accurate time information to other computers on a network. The term 'time server' is often used in the context of Network Time Protocol (NTP), which is a protocol used to synchronize the clocks of computers over a network. The crossword solution for TIME SERVER is CON, which stands for controller. A controller is a device or program that manages the flow of data between two systems. In this case, the controller is responsible for providing accurate time information to other computers on the network.