original_query: What is DOS Protected Mode Services (DPMS)?
query: What is DOS Protected Mode Services (DPMS)?
answer: DOS Protected Mode Services (DPMS) is a set of extended DOS memory management services that allow DOS drivers to load and execute in extended memory and protected mode, freeing up conventional memory for other applications.  It's not a DOS extender itself but provides services to modified DOS resident system extensions (like drivers or TSRs) to relocate into extended memory and run in 16-bit or 32-bit protected mode.