The issues involved in using a network operating system for a student laboratory of workstations are discussed. The network now consists of thirty workstations connected by a 10 Mbits/second Ethernet. UNIX United combines the workstations into a single, unified system. A network of workstations has several advantages over a mainframe; it is extensible, allows sharing of resources; and provides user isolation, uniform and predictable performance, and flexibility in tailoring individual machines for special uses. UNIX United provides networkwide file naming, remote file access, and remote execution. However, a networked system raises a multitude of issues concerning how hardware and software resources are shared, how file space is managed, how administration is applied, and how the network system performs. The research on these issues is summarized.