HAA	HaloAcetic Acid
HAA	Helicopter Association of America
HAA	Hired Assassin Agency
HAB	Hanford Advisory Board
HAB	Harmful Algal Bloom
HAB	Hass Avocado Board
HAB	Have A Blast
HAB	Hawaii Association of the Blind
HAB	Heavy Assault Bridge
HAB	High Altitude Burst
HAB	High Availability Board
HAB	High-Alumina Basalt
HAB	Horn of Africa Bulletin
HAB	Hot American Babe
HAB	Housing Assistance Bureau
HAB	[Hong Kong] Home Affairs Bureau
HAC	Hershey Apple Core
HAC	High-Availability Computing
HAC	Honourable Artillery Company
HAC	Hose Appropriations Committee
HAD	High Aluminum Defect
HAE	High Altitude, long-Endurance
HAF	Halogen Acid Furnace
HAF	Hellenic Air Force
HAG	Hansen Assembly of God
HAG	Hardware Action Group
HAG	Have-A-Go
HAG	Hazardous Activity Group
HAG	Helicopter Action Group
HAG	Hi And Goodbye
HAG	High Assurance Guards
HAG	High-explosive Anti-armor Grenade
HAG	Highest Adjacent Grade
HAG	Highly Academically Gifted
HAG	Home Access Gateway
HAG	Housing Advocacy Group
HAH	Healthcare Association of Hawaii
HAI	Handbook of Artificial Intelligence
HAI	Helicopter Association International
HAI	Hellenic Aircraft Industries
HAJ	Hearts Afire Jewelry
HAJ	Hepaticoporto-Appendico-Jejunostomy
HAJ	Himalayan Association of Japan
HAK	Hugs And Kisses
HAL	Hackers At Large [Event]
HAL	Hard Array Logic
HAL	Hardware Abstraction Layer
HAL	Hardwired Array Logic
HAL	Heuristic ALgorithmic
HAL	HTML Auto Layout
HAL	Hybrid Assisted Limb
HAM	Hold And Modify
HAM	Host Adapter Module
HAN	High-Availability Network
HAN	Home ATM Network
HAO	High Altitude Observatory
HAP	Hardness Assurance Plan
HAP	Hazardous Air Pollutant
HAP	High-Assurance Platform
HAP	Host Access Protocol
HAQ	Half-Assed Question
HAR	Highway Advisory Radio
HAS	Hardened Aircraft Shelter
HAT	Hardware Address Translator
HAT	Hashed Address Table
HAT	Heap Analysis Tool
HAT	Height Above Terrain
HAT	Homework And Teachers
HAT	Host Airline Table
HAU	Host Attachment Unit
HAV	Hepatitis A Virus
HAW	Helicopter Assault Wave
HAX	Half-Assed eXamination
HAY	Hold A Year
HAZ	Heat Affected Zone
HBA	Host Block Adaptor
HBA	Host Bus Adaptor
HBA	Host-Based Authentication
HBB	Home-Based Business
HBC	Hudson Bay Company
HBD	Happy BirthDay
HBD	Helicopter Battle Damage
HBE	High Bay Extension
HBF	Head Before Feet
HBG	Home Buyers Guide
HBH	HeartBreak Hotel
HBI	Heated Biological Input
HBJ	Handcrafted Beaded Jewelry
HBJ	Harcourt, Brace, and Jovanovich
HBJ	Healthy Bodies by Julie
HBJ	Herald Business Journal
HBJ	Hootie and the Blowfish Jeremy
HBJ	Houston Business Journal
HBJ	HTML Business for Java
HBK	Heart Break Kid
HBL	Health Based Level
HBM	Her British Majesty
HBM	His British Majesty
HBN	Hexagonal Boron Nitride
HBO	Home Box Office
HBO	Human Body Odor
HBP	High Blood Pressure
HBQ	Huntington Brass Quintet
HBR	Harvard Business Review
HBR	Higgs-Bosonic Rudder
HBR	High Bit Rate
HBS	Hardware Breakdown Structure
HBT	Heterojunction Bipolar Transistor
HBU	Hub Bearing Unit
HBV	Hepatitis B Virus
HBW	Horizontal BeamWidth
HBX	Hepatitis B Virus X
HBY	Human BiologY
HCA	Hospital Corporation of America
HCA	Host Channel Adapter
HCA	HydroxyCitric Acid
HCB	Half Circle Back
HCB	Hampshire Cricket Board
HCB	Hard Carbon Brush
HCB	Health Care Beneficiary
HCB	Height of Cloud Base
HCB	Henri Cartier-Bresson
HCB	Hollow Concrete Block
HCB	Holy Cow Batman
HCB	House Connection Branch
HCB	HTML Comment Box
HCB	Human Capacity Building
HCC	High Constitutional Court
HCC	Host Control Component
HCC	Hyperbaric Compression Chamber
HCD	Hardware Configuration Definition
HCD	Hierarchical Coarse Directory
HCD	Host Controller Device
HCE	Halo Combat Evolved
HCE	Halo Custom Edition
HCE	Hardware Configuration Engineer
HCE	Hawaiian Creole English
HCE	Health Care Experience
HCE	Health Care of the Elderly
HCE	Heater Control Electronics
HCE	Here Comes Everybody
HCE	Highly Compensated Employee
HCE	Hobie Cat Europe
HCE	Hot Carrier Effect
HCE	Human Caused Error
HCE	Hyper-Cerebral Electrosis
HCF	Halt & Catch Fire [bogus CPU instruction]
HCF	High Cycle Fatigue
HCF	Host Command Facility
HCF	Hybrid Coordination Function
HCG	Hard Copy Generator
HCG	Hartford Computer Group
HCG	Health Care Guide
HCG	Hentai Computer Graphics
HCG	Hickson Compact Group
HCG	Hoefler Consulting Group
HCG	Human Communications Group
HCH	Halogenated Cyclic Hydrocarbons
HCH	Health Care for the Homeless
HCH	Herbert Clark Hoover
HCH	Holy Cross Hospital
HCI	Handgun Control, Inc. [now Brady Campaign]
HCI	Hardness Critical Item
HCI	Host Controller Interface
HCI	Hot Carrier Injection
HCI	Human Computer Interface
HCJ	Hague Convention on Jurisdiction
HCJ	Heliborne Common Jammer
HCJ	High Court of Justice
HCJ	Hunting Camp Journal
HCK	Handfree Car Kit
HCK	Hat Check Kelly
HCK	Helmet Camera Kit
HCK	Hemopoetic Cell Kinase
HCK	Hemp Cutter Knife
HCK	Heritage Community of Kalamazoo
HCK	Hermit Crab Kit
HCK	HID Conversion Kit
HCK	Hill Country Karate
HCK	Hindu Council of Kenya
HCK	Historical Confederation of Kentucky
HCK	Home Collection Kit
HCK	Horizontal Component Kit
HCK	Hospice Care Kenya
HCK	Hospital Compressor Kit
HCK	Human Cervical Keratinocyte
HCL	Hardware Compatibility List
HCL	High Cost of Living
HCL	Host Control Links
HCM	Hollow Cathode Magnetron
HCN	High Calorie And Nitrogen
HCN	Historical Climatology Network
HCN	Homework Center Newsletter
HCO	Hubbard Communication Office
HCP	Handling Charge & Profit
HCP	Hardness Critical Procedures
HCP	Hardness Critical Process
HCP	Heads Up Control Panel
HCP	Health Care Provider
HCQ	Health Care Quality
HCQ	Hepatitis Council of Queensland
HCR	Hodge Computer Research, Inc.
HCS	Hot-Carrier Suppressed
HCT	Hardware Compatibility Tests
HCT	Hypothetical Changeset Tool
HCU	Home Computer User
HCU	Hydraulic Control Unit
HCV	Hepatitis C Virus
HCW	Hard Corrugated Wall
HCW	Hardcore Championship Wrestling
HCW	Health Care Worker
HCW	Heaven Can Wait
HCW	Heavily Cold-Worked
HCW	Hershey's Chocolate World
HCW	Heterogeneous Computing Workshop
HCW	Hot Carcass Weight
HCW	Hot Coupon World
HCW	How Computers Work
HCX	High Current eXperiment
HCY	High Contrast Yellow
HCY	Higher Council for Youth
HCZ	Harlem Children's Zone
HCZ	High Conductivity Zone
HDA	Head Disk Assembly
HDB	Hard DataBase
HDB	High Density Bay
HDB	High Density Bipolar
HDB	Hollow Dielectric Beamguide
HDB	Home Defense Brigade
HDB	Hot Dogs and Buns
HDB	Housing Development Board
HDB	Hull Distribution Box
HDB	Hydrostatic Design Basis
HDC	Hard Disk Controller
HDC	High Dependability Computing
HDD	Hard Disk Drive
HDD	Head Down Display
HDD	Honest Declaration about Dissertations
HDE	Hacking Defined Experts
HDE	Heater Drive Electronics
HDE	Heavy-Duty Engine
HDE	Higher Diploma in Education
HDE	Highly Distributed Environment
HDE	Historical Data Entry
HDE	Home Docking Environment
HDE	Hottest Deals Ever
HDE	Humanitarian Device Exemption
HDE	Hypertext Document Engineering
HDF	Hierarchical Data Format
HDF	Horrible Document Format
HDF	Hubble Deep Field
HDG	Harbison Design Group
HDG	High Density Gateway
HDG	Home Defense Gun
HDG	Hot Dip Galvanized
HDH	Hawaii Department of Health
HDH	HDLC Distant Host
HDH	His Divine Holiness
HDH	Home Dear Home
HDI	Head to Disk Interference
HDI	Human Development Index
HDK	Hardware Development Kit
HDL	Hardware Definition Language
HDL	High Density Lipoprotein
HDM	Hardware Device Module
HDM	Heuristic Data Mining
HDM	Hot Dark Matter
HDP	Harbinger of the Doomed Packet
HDP	Hardware Development Plan
HDP	High-Density Plasma
HDR	Hard Disk Recorder
HDR	High Data Rate
HDR	High Dynamic-Range
HDR	Humanitarian Daily Ration
HDS	Hitachi Data Systems
HDS	Home Directory Service
HDT	Host Digital Terminal
HDV	Harmonic Demining Vehicle
HDV	Heavy Duty Vehicle
HDV	Helen Duval Visuals
HDX	Half DupleX
HEA	Head Equipment Assembly
HEA	Hot Environmental Attack
HEC	Header Error Correction
HEC	High-End Computing
HEI	Higher Education Institution
HEL	High Energy Laser
HEL	Human Engineering Laboratory
HEM	High Energy Magic
HEM	High-Efficiency Matching
HEM	High-level Entity Management
HEO	High Earth Orbit
HEP	Hardware Empowerment Program
HEP	High-Energy Physics
HER	Hazards Evaluation Report
HER	High Efficiency Red [LED]
HEU	Highly-Enriched Uranium
HEW	Home Electronics World [show]
HEW	[USA Department of] Health, Education and Welfare
HEX	High-Energy X-ray
HFA	Hierarchical Foreign Agent
HFB	Hacking For Britney [Spears]
HFC	Hot File Clustering
HFC	Hybrid Fiber Coax [cable]
HFC	HyperFine [splitting] Constant
HFD	Home For Dinner
HFE	Human Factors Engineering
HFM	Hand, Foot and Mouth [Disease]
HFO	Heavy Fuel Oil
HFP	Host Front-end Protocol
HFS	Hardware Functionality Scan
HFS	High-Frequency System
HFS	HotFax Share
HFS	HyperFine Splitting
HFS	[Apple] Hierarchical File System
HFT	High-Frequency Trading
HFT	[IBM] High Function Terminal
HGA	Head Gimbal Assembly
HGA	Hercules Graphics Adapter
HGA	High Gain Antenna
HGC	Heads-Up Guidance Computer
HGC	Hercules Graphics Card
HGC	Human Genetics Commission
HGH	Human Growth Hormone
HGM	Henk's GTF Monitor
HGS	Head Up Guidance System
HHD	Hybrid Hard Drive
HHE	Human Hibernation Experiment
HHG	Holy Hand Grenade
HHI	Herfindahl-Hirschman Index
HHQ	Higher HeadQuarters
HHS	[USA Department of] Health and Human Services
HIB	Humble Indie Bundle
HIC	Hybrid Integrated Circuit
HID	Human Interface Device
HIF	Hyper-G Interchange Format
HIG	How's It Going
HIG	Human Interface Group
HIG	Human Interface Guidelines
HIL	Hardware In the Loop
HIL	Horizontal Integrity Limit
HIL	Human Interface Loop
HIN	Habit Inhibiting Novelty [as opposed to NIH syndrome]
HIO	High-Impact Outage
HIP	Hacking In Progress [conference]
HIP	Hardware Instrumentation Package
HIP	Host Identity Payload
HIP	Hot Isostatic Pressure
HIP	HSSI Interface Processor
HIP	Human Interactive Proof
HIR	High-level Intermediate Representation
HIS	Health Information System
HIS	Highest International Standards
HIS	Home Internet Solution
HIS	Honeywell Information System
HIS	[Microsoft] Host Integration Server
HIT	Health Indication Test
HIT	HIerarchical Trace [Processor]
HIT	High Impact Technology
HIU	Host Interface Unit
HIV	Hacker, Intruder, or Virus
HIV	Human Immunodeficiency Virus
HJA	[Origami] Huzita-Justin Axioms
HJB	[SUN] HotJava Browser
HKA	Horizontal Key Actions
HKF	Host Key File
HKL	Hong Kong Luna
HLA	High Level Assembly
HLC	Heavy Lift Capability
HLC	Host Level Call [Interface]
HLD	Head Level Display
HLE	Hacking Linux Exposed
HLE	Hardware Lock Elision
HLE	Higher Layer Entity
HLF	Horizontal Laminar Flow
HLF	Human Liberation Front
HLI	High Level Information
HLL	High-Level [programming] Language
HLN	High Level Network
HLO	High-Level Optimizer
HLP	Helsinki Language Processor
HLQ	High Level Qualifier
HLR	Home Location Register
HLS	High-Level Synthesis
HLS	HTTP Live Streaming
HLS	Hue, Luminance, Saturation
HLV	Heavy Lift Vehicle
HMA	High Memory Area
HMC	Halley Multicolor Camera
HMC	Hardware Management Console
HMC	Hosted Messaging & Collaboration
HMC	Hydro Mechanic Control
HMD	Head Mounted Display
HMD	Helmet-Mounted Designator
HME	[SUN] Happy Meal Ethernet [card]
HMF	High Magnetic Field
HMI	Handbook of Maintenance Instructions
HMI	Helioseismic and Magnetic Imager
HMI	HTML Mail Interface
HMI	Hub Management Interface
HMI	Human-Machine Interface
HML	Home Media Librarian
HMM	Heavy Maintenance Manual
HMM	Hidden Markov Model
HMM	Hungry Movie Maker
HMO	Health Maintenance Organisation
HMO	Hibbert Moneymaking Organization
HMO	Hueckel Molecular Orbital
HMP	Haughton Mars Project
HMP	Head-Mounted Projector
HMP	Host Monitoring Protocol
HMS	Hazardous Materials Summary
HMS	Helmet Mounted Sight
HMS	Her Majesty's Ship
HMS	His Majesty's Ship
HMT	Her Majesty's Transport
HMT	His Majesty's Transport
HMU	Height Monitoring Unit
HMU	Hydraulic Mechanical Unit
HMV	His Master's Voice
HNF	Hermite Normal Form
HNN	High-performance Network Node
HNS	Hospitality Network Service
HNS	Host Nation Support
HNS	Hughes Network Systems
HNY	Happy New Year
HOD	Host On-Demand
HOE	Homing Overlay Experiment
HOF	Higher Order Function
HOL	Head-Of-the-Line
HOL	High Order Language
HON	Health On the Net
HOP	Hacktic Office Party
HOP	HangOut Party
HOS	Head Of String
HOS	Higher Order Software
HOT	Heap Only Tuples
HOT	High Oil Temp
HOV	High Occupancy Vehicle
HOW	Hand-Over Word
HOW	Home Owners Warranty
HPA	Hecto PAscal
HPA	High Power Amplifier
HPA	High-Performance Addressing
HPA	Host-Protected Area
HPC	Handheld Personal Computer
HPC	Hasty Pudding Cipher
HPC	Hewlett-Packard Compaq
HPC	High Pressure Compressor
HPC	High-Performance Computing
HPC	Highly Paid Consultant
HPD	High Performance Division
HPF	High-Performance Fortran
HPG	Hewlett-Packard Graphics
HPI	Hardware Platform Interface
HPI	High Pressure Isolation
HPI	Hourly Postflight Inspection
HPJ	Help ProJect
HPL	High-Performance Logic
HPL	Honest Public License
HPL	The Handbook of Programming Languages
HPM	Hazardous Production Materials
HPM	High-Power Microwave [bomb]
HPO	Higher Performance Option
HPP	Hacker's Profiling Project
HPP	Heuristic Programming Project
HPP	Homogenous Poisson Process
HPP	HTTP Parameter Pollution
HPR	High Performance Routing
HPR	High Power Relay
HPR	High Production Release
HPS	Hardened Personnel Shelter
HPS	Helmet Positioning System
HPS	High-Performance Selling
HPS	High-Performance Substrate
HPT	High Pressure Turbine
HPU	Hydraulic Power Unit
HPV	Health Purchasing Victoria
HPV	High Pressure Valve
HPV	Human Papilloma Virus
HPW	High Performance Workstation
HRA	Home Recording Act
HRA	Human Reliability Analysis
HRC	Hard Rock Cafe
HRC	Human Rights Commission
HRD	Human Resources and Development
HRD	Human Rights Defense [International]
HRG	High Resolution Graphics
HRH	Harry Ron and Hermione
HRH	Her Royal Highness
HRH	His Royal Highness
HRH	Human Resources for Health
HRI	Hazard Risk Index
HRI	Height Range Indicator
HRI	High Resolution Imager
HRL	Headquarters, Research Laboratory
HRL	Human Research Laboratory
HRM	Hardware Reference Manual
HRM	Hierarchical Resource Manager
HRM	High-Resolution Mapping
HRM	Human Resource Management
HRR	High Ramp Rate
HRS	Human Recognition Services
HRT	Hard Real-Time
HRT	Hormone Replacement Therapy
HRT	[word processing] Hard ReTurn
HRV	Heart Rate Variability
HRV	Heat Recovery Ventilation
HRW	Human Rights Watch
HSA	Hardware System Area
HSA	Health Surveillance Assistants
HSA	Heterogeneous System Architecture
HSA	High Speed Amphibian [car]
HSB	Hue, Saturation, Brightness
HSC	Hall Social Coordinator
HSC	Hardware System Command
HSC	Hierarchical Storage Controller
HSD	Hardware Specification Document
HSD	High-Satisfaction Day
HSD	Homeland Security Department
HSE	[UK] Health and Safety Executive
HSF	Heat Sink Fan
HSH	Heat Sinks for the Homeless
HSI	Health and Safety Institute
HSI	High Speed Interface
HSI	Hockey Stick Index
HSI	Horizontal Situation Indicator
HSI	Hot Section Inspection
HSI	Hue, Saturation, Intensity
HSI	Human Systems Integration
HSK	Horrendous Space Kablooie
HSL	Heading SeLect
HSL	Hub Support Layer
HSM	Hardware-Specific Module
HSM	Hierarchical Storage Management
HSM	Host Security Module
HSM	HotSync Manager
HSN	Hopping Sequence Number
HSN	Hours Since New
HSP	Host Signal Processing
HSP	[HST] High Speed Photometer
HSR	High Stability Reference
HSS	High Speed Steel
HSS	Hit Song Science
HSS	Home Subscriber Server
HST	Hawaiian Standard Time
HST	High Speed Technology
HST	Hint [Branch] Strongly Taken [x86 CPU instruction]
HST	Hubble Space Telescope
HSV	Herpes Simplex Virus
HSV	Hue Saturation Value
HTA	Hollywood Talent Agency
HTA	HTML Application
HTB	Hierarchical Token Bucket
HTC	Hardware Trace Cache
HTC	High Pressure Turbine Casing
HTC	High Tech Computer [Corporation]
HTF	How The Fuck
HTG	HunT Group
HTH	Hope This Helps
HTH	Hotlist To HTML
HTK	Hits To Kill
HTL	High Threshold Logic
HTM	Hardware Transactional Memory
HTM	Hierarchical Triangular Mesh
HTO	High-Tech Offensive
HTO	High-Temperature Oxidation
HTT	HyperText Template
HUC	Honker Union of China
HUD	Head-Up Display
HUD	[USA] Housing and Urban Development
HUP	Head Up Panel
HUP	Hospital of the University of Pennsylvania
HUR	High Usage Report
HUT	Hopkins Ultraviolet Telescope
HVA	Harvest Vulnerability Assessment
HVB	High Voltage Breaker
HVC	Holographic Versatile Card
HVD	Holographic Versatile Disk
HVM	Hybrid Virtual Machine
HVN	Hearing Voices Network
HVV	Henk Van Voorthuijsen
HWB	Hot-Water Bottle
HWD	Height-Width-Depth
HWG	HTML Writers Guild
HWM	High-Water Mark
HWP	HardWare Prefetcher
HWP	Heavy-Weight Process
HWP	Height and Weight Proportionate
HWR	HandWriting Recognition