What does HDF stand for?

Haitian Development Fund - Later, MH (EA)

Halogenated Dibenzofuran - Organic chemistry

Handle Door Fastener

Hartmann Dispersion Formula

H D Fiberglass Inc., Youngsville, NC - Manufacturer code for watercraft hull identification number (USCG)

HDSL Dual Framer (SAUS)

Hereditary Disease Foundation (EA)

Hierarchical Data Format - Computer science

High-Density Flexible

High-Desirable Facility (SAUS)

High-Frequency Direction Finding - Electronics

Highly Dispersive Filter (SAUS)

Home Defence Force (SAUO)

Horizontal Data Flow (SAUS)

Horizontal Distributing Frame

Horrible Document Format (XSAL)

Horyal Democratic Front (SAUS)

Host Data Facility (SAUS)

Host Defensive Factor - Immunology (AAMN)

Hubble Deep Field - Astronomy

Human Diploid Fibroblasts - Cytology

Human Factor Division of Air Research and Development. (SAUS)

Hungarian Democratic Forum - Political party (EY)