HDT

HDT may refer to:


 * HDT (data format), a data compression format
 * Hardware Detection Tool, software for SYSLINUX
 * Hawaii-Aleutian Daylight Time
 * Heat deflection temperature, at which a polymer deforms under load
 * Holden Dealer Team, a former car-racing team
 * Henry David Thoreau, American transcendentalist poet
 * Heavy Duty Truck (HDT), a class 7 or 8 prime mover, the term is usually used in the fifth wheel rv industry