6B0000 - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - BUFFERED WRITE
 6B0100 - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - BUFFERED READ
 6B02 - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - INSTALL CHECK
 6B0600 - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - CONTROL
 6B0700 - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - GET STATUS
 6B10 - NPC NCSI EXTENDED SERIAL I/O - GET STATUS
 6B11 - NPC NCSI EXTENDED SERIAL I/O - ALLOCATE A VIRTUAL CIRCUIT
 6B12 - NPC NCSI EXTENDED SERIAL I/O - VIRTUAL CIRCUIT STATUS
 6B13 - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE REQUEST/REPLY SERVICE NAME
 6B14 - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE SERVICE ADDRESS
 6B15 - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE VIRTUAL CIRCUIT CONFIG
 6B16 - NPC NCSI EXTENDED SERIAL I/O - LOG AND/OR INITIALIZE VIRTUAL CIRCUIT
 6B17 - NPC NCSI EXTENDED SERIAL I/O - DISCONNECT A VIRTUAL CIRCUIT
 6B18 - NPC NCSI EXTENDED SERIAL I/O - WRITE DATA ON A VIRTUAL CIRCUIT
 6B19 - NPC NCSI EXTENDED SERIAL I/O - READ DATA ON A VIRTUAL CIRCUIT
 6B1A - NPC NCSI EXTENDED SERIAL I/O - RECEIVE STATUS
 6B1B - NPC NCSI EXTENDED SERIAL I/O - TRANSMIT STATUS
 6B1C - NPC NCSI EXTENDED SERIAL I/O - RECEIVE BUFFER CONTROL
 6B1D - NPC NCSI EXTENDED SERIAL I/O - TRANSMIT BUFFER CONTROL
 6B1E - NPC NCSI EXTENDED SERIAL I/O - ISSUE CONTROL REQUEST
 6B1F - NPC NCSI EXTENDED SERIAL I/O - EXTERNAL STATUS
 6B21 - NPC NCSI EXTENDED SERIAL I/O - QUERY NAME SERVICE
 6B6B - Tandy SCHOOLMATE PLUS - API
 6B - VIRUS - "Saddam" - ???