
  EXECUTIBLE PROGRAM IS EXEC16.EXE (RUN IT).

  WARNING!!! DO NOT RUN EXAMPLE.COM!!! IT'S CAN FREEZE YOUR COMPUTER...

  EXAMPLE.COM is not an executible program. It is only an example of
  a real mode procedure. EXAMPLE.COM ends with RETF and can be called
  from other executible programs. Real DOS executible programs must be
  terminated with the exit function 4Ch (int 21h).