What Does NetBIOS Extended User Interface Mean?
NetBIOS Extended User Interface (NetBEUI) is a non-routable transport protocol that provides network/network layer support while optimizing small to medium-sized operating systems (OS). NetBEUI works for internal LAN communication.
Techopedia Explains NetBIOS Extended User Interface
NetBEUI expands the Network Basic Input/Output System (NetBIOS), which is an application programming interface (API) developed by IBM in 1983.