**DIR**     supp8080    fprintf     fscanf      scan        fltlib      
fopen       fread       **DIR**     fseek       fgets       fputs       
getc        putc        ungetc      getbuff     setbuf      alloc       
format      callcpm     croot       open        read        write       
lseek       posit       **DIR**     blkio       rename      unlink      
atof        atol        atoi        block       atol        atoi        
block       string      toupper     closall     lsubs       fstub       
