The term 'central computer' refers to a computer system that serves as the main HUB for a network. It is typically responsible for managing communications between other computers, providing access to shared resources, and performing other administrative tasks. The crossword solutions for this term are SERVER (6 letters), HOST (4 letters), MID (3 letters), and HUB (3 letters). A SERVER is a computer program or device that provides services to other programs or devices on the same network. A HOST is a computer that is connected to a network and provides services to other computers on the same network. MID stands for 'main interface device' and is a computer that acts as an intermediary between two or more networks. Finally, a HUB is a device that connects multiple computers together in a network.