(often attributive) A compact audio/video interface for transmitting uncompressed digital data.

Initialism of Human Development Index, a United Nations measure of well-being in a country.

(physics) Initialism of hot dark matter.

Initialism of hepatitis delta virus. / Initialism of high-definition video.

(communication) Initialism of historical data access (an OPC standard)

(algebra) Initialism of higher-dimensional algebra. / (genetics) Initialism of helicase dependent amplification. / (hydrology) Initialism of high-density amorphous ice.

Abbreviation of hot-dip aluminized.

(communication, programming) Initialism of OPC Historical Data Access (group of standards of the OPC Foundation that provides COM specifications for communicating data from devices, like databases, and applications that provide historical data.)

Abbreviation of header.

Abbreviation of headquarters.