What does .HH stand for?

What does .HH mean?

.HH	text/plain Internet » MIME Types
HH	Hand Held Governmental » Military
HH	Hip Hop Community » Music
HH	Hansestadt Hamburg Business » Firms
HH	Hansestadt Hamburg International » German
HH	Head to Head Community » Sports
HH	Hard of Hearing Medical » Physiology
HH	H. H. Smith Governmental » Suppliers
HH	High Heels Miscellaneous » Clothes
HH	High Heat Academic & Science » Electronics
HH	HouseHold Community » Media
HH	Helly Hansen, clothiers Business » Firms
HH	Happy Halloween Community
HH	Hooper Holmes, Inc. Business » AMEX Symbols
HH	Happy Happy Internet » Chat
HH	Hi Hat Community » Music
HH	Herbie Hancock Community » Famous
HH	Hochschild Homology Medical » Hospitals
HH	Hiatus Hernia Medical » Physiology
HH	Hands High Governmental » Military
HH	Heavy Hole Academic & Science » Electronics
HH	Hard House Community » Music
HH	Homework Help Community » Educational
HH	Hand Hammered Business » Products
HH	Huge Help Community