What does Hex stand for?

Hexamethylmelamine (STED)

Handicapped Education Exchange - Amateur Radio Research and Development Corp. - Information service or system (IID)

Hatfield Executive Aviation Ltd. - British - ICAO designator (FAAC)

Heat Exchanger (KSC)

Heck's, Inc. - NYSE symbol (COMM)

Helsinki Exchanges Group Ltd Oy

Hemlo Explorations - Vancouver Stock Exchange symbol

Heritage Boat Works, Wichita, KS - Manufacturer code for watercraft hull identification number (USCG)

Hexachlorocyclopentadiene - Also, HCCP, HCP - Organic chemistry

Hexachord - Music (ADA)

Hexadecimal - System

Hexagon - or Hexagonal

Hexamethylmelamine - Altretamine - Also, HMM, HXM - Antineoplastic drug

Hexateuch (ROG)

Hexosaminidase (DB)

High Explosive (DNAB)

Human Experimentation Committee (PHAR)

Hydraulics, External (DNAB)

Santo Domingo - Dominican Republic - Airport symbol (OAG)

Hexadecimal (AEBE)

Hexagon (SHCU)

Hexatic (MEC)