.MODEL SMALL
  .STACK 64
  .DATA
  ....
  .CODE
EXTRN SUBPROG1:NEAR
EXTRN SUBPROG2:NEAR
MAIN: MOV AX,@DATA 
  MOV DS,AX
  CALL SUBPROG1
  CALL SUBPROG2
  MOV AH,4CH
  INT 21H
  END MAIN 
  .MODEL SMALL
  .CODE
  PUBLIC SUBPROG1
  SUBPROG1 PROC
  ...
  RET
  SUBPROG1 ENDP
  END
  .MODEL SMALL
  .CODE
  PUBLIC SUBPROG2
  SUBPROG2 PROC
  ...
  RET
  SUBPROG2 ENDP
  END