NetBIOS

from The Free On-line Dictionary of Computing (8 July 2008)

NetBIOS

   An {applications programming interface} (API) which activates
   {network} operations on {IBM PC} compatibles running under
   {Microsoft}'s {DOS}.  It is a set of network commands that the
   application program issues in order to transmit and receive
   data to another {host} on the network.  The commands are
   interpreted by a {network control program} or {network
   operating system} that is NetBIOS compatible.  See
   {NetBOLLIX}.

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

NETBIOS
       NETwork Basic Input Output System (IBM, RFC 1001/1002), "NetBIOS"