This is a peer-to-peer operating system developed by the company Artisoft for Ethernet and Token Ring networks. Also see Ethernet Network Peer-to-Peer network Token Ring
A peer-to-peer network operating system that was once the most popular choice for small networks, before the built-in Windows for Workgroups and Windows 95 came along.
LANtastic was a peer-to-peer local area network (LAN) operating system for DOS, Microsoft Windows and OS/2. LANtastic supports Ethernet, ARCNET and Token Ring adapters as well as its own twisted-pair adapter at two Mbit/s.