What does HLD stand for?

What does HLD mean?

HLD	High Level Design Computing » General
HLD	Harolds Stores, Inc. Business » AMEX Symbols
HLD	High Level Data Computing » Databases
HLD	Hailar, Mainland China Regional » Airport Codes
HLD	Heavy Like Dat Internet » Chat
HLD	Huang Lyuu Dai lattice algorithm Academic & Science » Mathematics
HLD	Heavy Lifting Device Academic & Science » Architecture
HLD	Hold Governmental » NASA