heterodyne
heterodyne-frequency
heuristic
hexadecimal
hexode
hf
HHF
hierarchical
hierarchy
hi-fi
  high
high-bandwidth
high-capacity
high-current
high-cycle
high-data-rate
high-definition
high-directivity
high-efficiency
higher-mode
higher-order

    high speed circuit switched data

    высокочастотная передача данных по коммутируемым каналам