(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)