1511 INT 15 - TopView commands
1511 INT 15 - VMiX - "sys_system" - EXECUTE SHELL SYSTEM COMMANDS
1511 INT 15 - MultiDOS Plus - TURN OFF AltZ TOGGLE
151117BX0000 INT 15 - DESQview v2.20+ - "ASSERTMAP" - GET/SET MAPPING CONTEXT
1511DE INT 15 - DESQview - QEXT.SYS - INSTALLATION CHECK