List of abbreviations: H

HAPS High Altitude Platform Station
HDFS High Density Fixed Service
HDFSS High Density Fixed-Satellite Service
HDTV High Definition TeleVision
HDTP Hoofddirectie Telecommunicatie en Post van het Ministerie van Verkeer en Waterstaat (NL)
HEO Highly inclined Elliptical Orbit
HF High Frequency (frequency range 3 to 30 MHz)
HFBC High Frequency Broadcasting
HIPERLAN High Performance Local Area Network
HLC High Level Commitee (ITU)