21E3 - OS/286, OS/386 - ISSUE REAL INTERRUPT
 21E3 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB
 21E3 - Novell NetWare - CONNECTION CONTROL
 21E3 - Novell NetWare - CONNECTION SERVICES - ENTER LOGIN AREA
 21E3 - Novell NetWare - MESSAGE SERVICES - LOG NETWORK MESSAGE
 21E3 - Novell NetWare - FILE SERVER - GET DISK UTILIZATION
 21E3 - Novell NetWare - FILE SERVICES - SCAN FILE INFORMATION
 21E3 - Novell NetWare - FILE SERVICES - SET FILE INFORMATION
 21E3 - Novell NetWare - FILE SERVER - GET FILE SERVER INFORMATION
 21E3 - Novell NetWare - CONNECTION SERVICES - GET INTERNET ADDRESS
 21E3 - Novell NetWare - CONNECTION SERVICES - LOGIN TO FILE SERVER
 21E3 - Novell NetWare - CONNECTION SERVICES - GET OBJECT CONNECTION NUMBERS
 21E3 - Novell NetWare - CONNECTION SERVICES - GET CONNECTION INFORMATION
 21E3 - Novell NetWare - BINDERY SERVICES - CREATE BINDERY OBJECT
 21E3 - Novell NetWare - BINDERY SERVICES - DELETE BINDERY OBJECT
 21E3 - Novell NetWare - BINDERY SERVICES - RENAME BINDERY OBJECT
 21E3 - Novell NetWare - BINDERY SERVICES - GET BINDERY OBJECT ID
 21E3 - Novell NetWare - BINDERY SERVICES - GET BINDERY OBJECT NAME
 21E3 - Novell NetWare - BINDERY SERVICES - SCAN BINDERY OBJECT
 21E3 - Novell NetWare - BINDERY SERVICES - CHANGE BINDERY OBJECT SECURITY
 21E3 - Novell NetWare - BINDERY SERVICES - CREATE PROPERTY
 21E3 - Novell NetWare - BINDERY SERVICES - DELETE PROPERTY
 21E3 - Novell NetWare - BINDERY SERVICES - CHANGE PROPERTY SECURITY
 21E3 - Novell NetWare - BINDERY SERVICES - SCAN PROPERTY
 21E3 - Novell NetWare - BINDERY SERVICES - READ PROPERTY VALUE
 21E3 - Novell NetWare - BINDERY SERVICES - WRITE PROPERTY VALUE
 21E3 - Novell NetWare - BINDERY SERVICES - VERIFY BINDERY OBJECT PASSWORD
 21E3 - Novell NetWare - BINDERY SERVICES - CHANGE BINDERY OBJECT PASSWORD
 21E3 - Novell NetWare - BINDERY SERVICES - ADD BINDERY OBJECT TO SET
 21E3 - Novell NetWare - BINDERY SERVICES - DELETE BINDERY OBJECT FROM SET
 21E3 - Novell NetWare - BINDERY SERVICES - IS BINDERY OBJECT IN SET
 21E3 - Novell NetWare - BINDERY SERVICES - CLOSE BINDERY
 21E3 - Novell NetWare - BINDERY SERVICES - OPEN BINDERY
 21E3 - Novell NetWare - BINDERY SERVICES - GET BINDERY ACCESS LEVEL
 21E3 - Novell NetWare - DIRECTORY SERVICES - SCAN BINDERY OBJ TRUSTEE PATHS
 21E3 - Novell NetWare - QUEUE SERVICES - CREATE QUEUE
 21E3 - Novell NetWare - QUEUE SERVICES - DESTROY QUEUE
 21E3 - Novell NetWare - QUEUE SERVICES - READ QUEUE CURRENT STATUS
 21E3 - Novell NetWare - QUEUE SERVICES - SET QUEUE CURRENT STATUS
 21E3 - Novell NetWare - QUEUE SERVICES - CREATE QUEUE JOB AND FILE
 21E3 - Novell NetWare - QUEUE SERVICES - CLOSE FILE AND START QUEUE JOB
 21E3 - Novell NetWare - QUEUE SERVICES - REMOVE JOB FROM QUEUE
 21E3 - Novell NetWare - QUEUE SERVICES - GET QUEUE JOB LIST
 21E3 - Novell NetWare - QUEUE SERVICES - READ QUEUE JOB ENTRY
 21E3 - Novell NetWare - QUEUE SERVICES - CHANGE QUEUE JOB ENTRY
 21E3 - Novell NetWare - QUEUE SERVICES - CHANGE QUEUE JOB POSITION
 21E3 - Novell NetWare - QUEUE SERVICES - ATTACH QUEUE SERVER TO QUEUE
 21E3 - Novell NetWare - QUEUE SERVICES - DETACH QUEUE SERVER FROM QUEUE
 21E3 - Novell NetWare - QUEUE SERVICES - SERVICE QUEUE JOB AND OPEN FILE
 21E3 - Novell NetWare - QUEUE SERVICES - FINISH SERVICING QUEUE JOB AND FILE
 21E3 - Novell NetWare - QUEUE SERVICES - ABORT SERVICING QUEUE JOB AND FILE
 21E3 - Novell NetWare - QUEUE SERVICES - CHANGE TO CLIENT RIGHTS
 21E3 - Novell NetWare - QUEUE SERVICES - RESTORE QUEUE SERVER RIGHTS
 21E3 - Novell NetWare - QUEUE SERVICES - READ QUEUE SERVER CURRENT STATUS
 21E3 - Novell NetWare - QUEUE SERVICES - READ QUEUE SERVER CURRENT STATUS
 21E3 - Novell NetWare - QUEUE SERVICES - GET QUEUE JOB'S FILE SIZE
 21E3 - Novell NetWare - ACCOUNTING SERVICES - GET ACCOUNT STATUS
 21E3 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT CHARGE
 21E3 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT HOLD
 21E3 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT NOTE
 21E3 - Novell NetWare - FILE SERVER - CHECK CONSOLE PRIVILEGES
 21E3 - Novell NetWare - FILE SERVER - GET FILE SERVER DESCRIPTION STRINGS
 21E3 - Novell NetWare - FILE SERVER - SET FILE SERVER DATE AND TIME
 21E3 - Novell NetWare - FILE SERVER - DISABLE FILE SERVER LOGIN
 21E3 - Novell NetWare - FILE SERVER - ENABLE FILE SERVER LOGIN
 21E3 - Novell NetWare - FILE SERVER - GET FILE SERVER LOGIN STATUS
 21E3 - Novell NetWare - FILE SERVICES - PURGE ALL ERASED FILES
 21E3 - Novell NetWare - FILE SERVER - DISABLE TRANSACTION TRACKING
 21E3 - Novell NetWare - FILE SERVER - ENABLE TRANSACTION TRACKING
 21E3 - Novell NetWare - FILE SERVER - SEND CONSOLE BROADCAST
 21E3 - Novell NetWare - FILE SERVER - CLEAR CONNECTION NUMBER
 21E3 - Novell NetWare - FILE SERVER - DOWN FILE SERVER
 21E3 - Novell NetWare - FILE SERVER - GET FILE SYSTEM STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET TRANSACTION TRACKING STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET DISK CACHE STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET DRIVE MAPPING TABLE
 21E3 - Novell NetWare - FILE SERVER - GET PHYSICAL DISK STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET DISK CHANNEL STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET CONNECTION'S TASK INFORMATION
 21E3 - Novell NetWare - FILE SERVER - GET CONNECTION'S OPEN FILES
 21E3 - Novell NetWare - FILE SERVER - GET CONNECTIONS USING A FILE
 21E3 - Novell NetWare - FILE SERVER - GET PHYSICAL RECORD LOCKS BY CONN&FILE
 21E3 - Novell NetWare - FILE SERVER - GET PHYSICAL RECORD LOCKS BY FILE
 21E3 - Novell NetWare - FILE SERVER - GET LOGICAL RECORDS BY CONNECTION
 21E3 - Novell NetWare - FILE SERVER - GET LOGICAL RECORD INFORMATION
 21E3 - Novell NetWare - FILE SERVER - GET CONNECTION'S SEMAPHORES
 21E3 - Novell NetWare - FILE SERVER - GET SEMAPHORE INFORMATION
 21E3 - Novell NetWare - FILE SERVER - GET LAN DRIVER'S CONFIGURATION INFO
 21E3 - Novell NetWare - FILE SERVER - GET CONNECTION'S USAGE STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET BINDERY OBJECT DISK SPACE LEFT
 21E3 - Novell NetWare - FILE SERVER - GET FILE SERVER LAN I/O STATISTICS
 21E3 - Novell NetWare - FILE SERVER - GET FILE SERVER MISC INFORMATION
 21E3 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME INFORMATION
 21E4 - Novell NetWare 4.0 - SET FILE ATTRIBUTES (FCB)
 21E4 - VIRUS - "Anarkia" - INSTALLATION CHECK
 21E400 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS
 21E400 - OS/286, OS/386 - CHAIN TO REAL-MODE HANDLER
 21E402 - OS/286, OS/386 - SET PROTECTED-MODE TASK GATE
 21E403 - OS/286, OS/386 - REMOVE PROTECTED-MODE TASK GATE
 21E5 - Novell NetWare 4.0 - UPDATE FILE SIZE (FCB)
 21E5 - DoubleDOS - OTHER PROGRAM STATUS
 21E500 - OS/286, OS/386 - HEAP MANAGEMENT STRATEGY
 21E501 - OS/286, OS/386 - FORCE HEAP COMPACTION
 21E6 - Novell NetWare 4.0 - COPY FILE TO FILE (FCB)
 21E6 - OS/286, OS/386 - ISSUE REAL PROCEDURE SIGNAL FROM PROTECTED MODE
 21E7 - Novell NetWare - FILE SERVER - GET FILE SERVER DATE AND TIME
 21E7 - OS/286, OS/386 - CREATE CODE SEGMENT
 21E7 - VIRUS - "Spyer"/"Kiev" - INSTALLATION CHECK
 21E8 - Novell NetWare 4.6, Alloy NTNX - SET FCB RE-OPEN MODE
 21E8 - OS/286, OS/386 - SEGMENT CREATION
 21E8 - DoubleDOS - SET/RESET KEYBOARD CONTROL FLAGS
 21E9 - OS/286, OS/386 - CHANGE SEGMENTS
 21E9 - DoubleDOS - SET TIMESHARING PRIORITY
 21E900 - Novell NetWare - DIRECTORY SERVICES - GET DIRECTORY HANDLE
 21E905 - Novell NetWare shell 3.01 - MAP A FAKE ROOT DIRECTORY
 21E906 - Novell NetWare shell 3.01 - DELETE FAKE ROOT DIRECTORY
 21E907 - Novell NetWare shell 3.01 - GET RELATIVE DRIVE DEPTH
 21E908BL00 - Novell NetWare shell 3.01 - SET SHOW DOTS
 21EA - Novell NetWare 4.6, Alloy NTNX - RETURN SHELL VERSION
 21EA - DoubleDOS - TURN OFF TASK SWITCHING
 21EA - OS/286, OS/386 - ALLOCATE HUGE SEGMENT
 21EB - Novell NetWare - SYNCHRONIZATION SERVICES - LOG FILE
 21EB - DoubleDOS - TURN ON TASK SWITCHING
 21EB00 - OS/386 VMM - GET A PAGE TABLE ENTRY BY LINEAR ADDRESS
 21EB02 - OS/386 VMM - GET A PAGE TABLE ENTRY BY 16-BIT SEGMENT:OFFSET
 21EB03 - OS/386 VMM - FREE MAPPED PAGES
 21EB04 - OS/386 VMM - GET A PAGE TABLE ENTRY BY 32-BIT SEGMENT:OFFSET
 21EB05 - OS/386 VMM - MAP PAGES
 21EB06 - OS/386 VMM - LOCK PAGES IN MEMORY
 21EB07 - OS/386 VMM - UNLOCK MEMORY PAGES
 21EC - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE
 21EC - DoubleDOS - GET VIRTUAL SCREEN ADDRESS
 21EC - OS/286, OS/386 - BLOCK TRANSFER
 21EC59 - VIRUS - "Terror" - INSTALLATION CHECK
 21ED - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR FILE
 21ED - OS/286, OS/386 - GET SEGMENT OR WINDOW DESCRIPTOR
 21EE - Novell NetWare - CONNECTION SERVICES - GET PHYSICAL STATION ADDRESS
 21EE - DoubleDOS - GIVE AWAY TIME TO OTHER TASKS
 21EE - VIRUS - "Jerusalem-G", "Pregnant" - INSTALLATION CHECK
 21EF00 - Novell NetWare - WORKSTATION - GET DRIVE HANDLE TABLE
 21EF01 - Novell NetWare - WORKSTATION - GET DRIVE FLAG TABLE
 21EF02 - Novell NetWare - WORKSTATION - GET DRIVE CONNECTION ID
 21EF03 - Novell NetWare - WORKSTATION - GET CONNECTION ID
 21EF04 - Novell NetWare - WORKSTATION - GET FILE SERVER NAME
 21F0 - DoubleDOS - MENU CONTROL
 21F0 - VIRUS - "Frere Jacques" - INSTALLATION CHECK
 21F000 - Novell NetWare - WORKSTATION - SET PREFERRED CONNECTION ID
 21F001 - Novell NetWare - WORKSTATION - GET PREFERRED CONNECTION ID
 21F002 - Novell NetWare - WORKSTATION - GET DEFAULT CONNECTION ID
 21F003 - Novell NetWare - PRINT SERVICES - GET LPT CAPTURE STATUS
 21F004 - Novell NetWare - WORKSTATION - SET PRIMARY CONNECTION ID
 21F005 - Novell NetWare - WORKSTATION - GET PRIMARY CONNECTION ID
 21F1 - Novell NetWare - CONNECTION SERVICES - FILE SERVER CONNECTION
 21F1 - DoubleDOS - CLEAR KEYBOARD BUFFER FOR CURRENT JOB
 21F1 - VIRUS - "F1-337" - ???
 21F2 - Novell NetWare v3.01+ shell interface - MULTIPLEXOR
 21F2 - DoubleDOS - SEND CHARACTER TO KEYBOARD BUFFER OF OTHER JOB
 21F244 - Novell NetWare - FILE SERVICES - ERASE FILES
 21F2AA - VIRUS - "PcVrsDs" - INSTALLATION CHECK
 21F3 - Novell NetWare - FILE SERVICES - FILE SERVER FILE COPY
 21F3 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB
 21F3 - VIRUS - "Carfield" - INSTALLATION CHECK
 21F400 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS
 21F5 - DoubleDOS - OTHER PROGRAM STATUS
 21F7 - VIRUS - "GP1" - INSTALLATION CHECK
 21F8 - DOS v2.11 - SET OEM INT 21 HANDLER
 21F8 - DoubleDOS - SET/RESET KEYBOARD CONTROL FLAGS
 21F9 - DOS v2.11 - OEM FUNCTION
 21F9 - DoubleDOS - SET TIMESHARING PRIORITY
 21FA - DOS v2.11 - OEM FUNCTION
 21FA - DoubleDOS - TURN OFF TASK SWITCHING
 21FA - PC Tools 7 VDEFEND - API
 21FB - DOS v2.11 - OEM FUNCTION
 21FB - DoubleDOS - TURN ON TASK SWITCHING
 21FB - VIRUS - "Cinderella" - INSTALLATION CHECK
 21FB0A - VIRUS - "dBASE" - INSTALLATION CHECK
 21FC - DOS v2.11 - OEM FUNCTION
 21FC - DoubleDOS - GET VIRTUAL SCREEN ADDRESS
 21FC - VIRUS - "Troi" - INSTALLATION CHECK
 21FD - DOS v2.11 - OEM FUNCTION
 21FD - VIRUS - "Border" - INSTALLATION CHECK
 21FE - DOS v2.11 - OEM FUNCTION
 21FE - DoubleDOS - GIVE AWAY TIME TO OTHER TASKS
 21FE - VIRUS - "483" - INSTALLATION CHECK
 21FE01 - VIRUS - "Flip" - INSTALLATION CHECK
 21FE02 - VIRUS - "2468"/"Tequila" - INSTALLATION CHECK
 21FEDC - PCMag PCMANAGE/DCOMPRES - INSTALLATION CHECK
 21FEDC - VIRUS - "Black Monday" - INSTALLATION CHECK
 21FF - DOS v2.11 - OEM FUNCTION
 21FF - CED (Command EDitor) - INSTALLABLE COMMANDS
 21FF - DJ GO32.EXE 80386+ DOS extender - DOS EXTENSIONS
 21FF - DOSED.COM - INSTALLATION CHECK
 21FF - Topware Network Operating System - ???
 21FF - VIRUS - "Sunday", "Tumen 0.5", "Hero" - INSTALLATION CHECK
 21FF - Rational Systems DOS/4GW - API
 21FF - Rational Systems DOS/4GW - SET ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - GET ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - GET/SET ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - NOP
 21FF - Rational Systems DOS/4GW - EXCHANGE ??? POINTERS
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - ???
 21FF - Rational Systems DOS/4GW - GET ??? FUNCTIONS
 21FF - Rational Systems DOS/4GW - GET ???
 21FF - Rational Systems DOS/4GW - ???
 21FF00DX0078 - Rational Systems DOS/4G - INSTALLATION CHECK
 21FF0F - FLU_SHOT+ v1.83 - INSTALLATION CHECK
 21FF10 - VIRUS - "Twins" - INSTALLATION CHECK
 21FFFE - VIRUS - "08/15"/"Many Fingers" - INSTALLATION CHECK
 21FFFF - VIRUS - "Ontario", "Year 1992"/"B1M92" - INSTALLATION CHECK
 21FFFFCX0000 - VIRUS - "Revenge" - INSTALLATION CHECK