EXTERN 	WORD dos_label();
EXTERN 	WORD dos_space();
EXTERN 	WORD dos_rmdir();
EXTERN 	WORD dos_chdir();
EXTERN 	WORD dos_gdir();
EXTERN 	WORD dos_sdta();
EXTERN 	WORD dos_sfirst();
EXTERN 	WORD dos_snext();
EXTERN 	WORD dos_gdrv();
EXTERN 	WORD dos_sdrv();
EXTERN 	WORD dos_create();
EXTERN 	WORD dos_mkdir();
EXTERN 	WORD dos_open();
EXTERN 	WORD dos_delete();
EXTERN 	WORD dos_rename();
EXTERN 	WORD dos_close();
EXTERN 	WORD dos_read();
EXTERN 	WORD dos_write();
EXTERN 	LONG dos_lseek();
EXTERN 	VOID dos_exec();
EXTERN 	WORD dos_wait();
EXTERN 	LONG dos_envir();
EXTERN 	WORD dos_chmod();
EXTERN 	LONG dos_alloc();
EXTERN 	WORD dos_free();
EXTERN 	WORD dos_setdt();
EXTERN 	WORD dos_find();
EXTERN  LONG dos_gint();
EXTERN  VOID dos_sint();
EXTERN	VOID dos_fdup();