Network OS, by CBIS, Inc of Atlanta Georgia, is a peer to peer networking client for DOS. It includes support for SMB/NETBios, file and printer sharing, and features the ability to easily load and unload to free up DOS memory when needed. It operates on Ethernet, token ring, Arcnet and more. As a peer-to-peer networking system, each node can operate as both a server and a workstation. It competed against Artisoft Lantastic.