What does HEH stand for?

Hehe - Language code (ETLW)

Heho - Myanmar - Airport symbol (OAG)

Henriques Yachts Inc., Bayville, NJ - Manufacturer code for watercraft hull identification number (USCG)

High Explosive, Heavy (SAUS)

His - or Her Exalted Highness - Term applied only to personages of British India

(Hydroxyethyl)hydrazine - Organic chemistry

Hyperkinetic Heart (SAUS)

Newark, OH - Location identifier - FAA (FAAL)