What is the full meaning of DREN? What does DREN stand for?

DREN stands for;

DREN Direction Régionale de l’Education Nationale (French: Regional Directorate of National Education; various locations)
DREN Direcção Regional de Educação do Norte (Portuguese: Regional Directorate of Education of the North)
DREN Defense Research and Engineering Network
DREN Durham Region Employment Network (Ontario, Canada)