INT 21 U - Novell NetWare - VNETWARE.386 API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - SET VIRTUAL MACHINE ID AX = B505h ??? Return: ??? SeeAlso: AX=B502h,AX=B506h