Hart, Michael (blog): http://hart.pglaf.org/
Havas: http://www.havas.fr/
HD DVD (high definition digital versatile disc): http://www.thelookandsoundofperfect.com/
HighWire Press: http://highwire.stanford.edu/
HTML (hypertext markup language): http://www.w3.org/MarkUp/
HTTP (hypertext transfer protocol): http://www.w3.org/Protocols/
Humanité (L’): http://www.humanite.presse.fr/
HumanWare: http://www.humanware.com/
HVD (holographic versatile disc) Alliance: http://www.hvd-alliance.org/
HyperNietzsche: http://www.hypernietzsche.org/