Hd

https://en.m.wikipedia.org/wiki/Special:AllPages?from=Hd&to=&namespace=0

HDI – Human Development Index

https://en.m.wikipedia.org/wiki/Human_Development_Index

List of countries by Human Development Index

https://en.m.wikipedia.org/wiki/List_of_countries_by_Human_Development_Index

HDD – Hard disk drive

https://en.m.wikipedia.org/wiki/Hard_disk_drive

HDMI

https://en.m.wikipedia.org/wiki/HDMI

HDTV – High-definition television

https://en.m.wikipedia.org/wiki/High-definition_television