Click above to get retro games delivered to your door ever month!

  Technical information about DOS has become much easier to find since the
  early days, when the only reliable sources of information were the DOS
  technical reference manuals. Nowadays, many PC programming magazines
  discuss DOS programming techniques. Several good reference books on
  various detailed aspects of DOS programming, including memory-resident
  programs, installable device drivers, and exception handlers, are also
  available.

  --------------------------------------------------------------------------
  NOTE:
    Two "official" sources of detailed information about DOS are the DOS
    technical reference manuals distributed by IBM and The MS-DOS
    Encyclopedia (published by Microsoft Press).
  --------------------------------------------------------------------------