(DPMI) The method which Microsoft prescribes for a DOs program to accessextended memory under a multitasking environment, e.g. Microsoft Windows. Thisservice is provided by the HIMEM.sYs driver on IBM PCs. The DPMI specification was finalized in 1990. The specification itself is available from {Intel Literature sales}. VCPI (Virtual Control Program Interface), which was an alternative, and incompatible method for doing the same thing. ["Windows 3.1 secrets", Brian Livingston, 1992, IsBN 1-878058-43-6, pages 280-281 and 302]. (1995-01-12)