NDBM_File(3) NDBM_File(3)
NDBM_File - Tied access to ndbm files
use NDBM_File; tie(%h, 'NDBM_File', 'Op.dbmx', O_RDWR|O_CREAT, 0640); untie %h;
See the tie entry in the perlfunc manpage PPPPaaaaggggeeee 1111