LanMan normally ran across Microsoft's basic, non-routable NetBIOS/NetBEUI NBF protocol, but Pathworks included a DECnet stack, including layers like the LAT transport used for terminal sessions.
These extensions include, among others, ODBC (called the "crowning jewel of WOSA"), TAPI, WOSA/XFS, SAPI and MAPI, and their supporting services, as well as the abstraction of access to printers, modems, and networking services, which run identically over TCP/IP, IPX/SPX, and NetBEUI.