What does HP stand for?

Air Hawaii - ICAO designator (AD)

ALAS, SA - Uruguay - ICAO designator (ICDA)

All India Reporter, Himachal Pradesh - A publication (DLA)

America West Airlines - ICAO designator (AD)

Haemophilus Pleuropneumoniae (DB)

Half Pay

Half Plate - Photography

Half Price (ROG)

Halogen Phosphorus - Medicine (EDAA)

Hand-Held Photo

Handicapped Person

Handling and Propulsion (AAG)

Handling Procedure (MCD)

Handmade Paper

Handpainted (WGA)

Hand Pump (SAUS)

Hannah's Prayer - Christian infertility/pregnancy loss group

Hard Palate - Medicine (MELL)

Hard Pipe (SAUS)

Hard Plastic - Doll collecting

Hard Point

Hardy Perennial - Horticulture (ROG)

Harmonic Progression

Harvard Photometry (SAUS)

Harvard Pulsar (SAUS)

Harvard Pump - Medicine (MELL)

Hauptpunkte - Crystallography

Haustus Purgans - Purging Draught - Pharmacy (ROG)

Haut Parleur - Loudspeaker - French

Hawker Siddeley Aviation Ltd. - British - ICAO aircraft manufacturer identifier (ICAO)

Hay-Pasturage - Agriculture

Hazard Pay (ALAC)

Hazard Prevention - A publication (EAAP)

Hazel Park, Detroit, Mich. - Horse racing track

Head Postmaster - British (DCTA)

Headquarters Pamphlet - Military (MCD)

Healthcare Product

Health Physicist (SAUS)

Health Physics - Nuclear energy (NRCH)

Health Physist - A radiation safety specialist

Health Plan (AMHC)

Heatable Plastic (SAUS)

Heating Plant (NATG)

Heat Pipe (SAUS)

Heat Production - Medicine (EDAA)

Heat Pump (SAUS)

Heenan Petroleum Ltd. - Toronto Stock Exchange symbol

Height of Perigee

Heir Presumptive

Helicobacter Pylori (SAUS)

Helicopter (NATG)

Heliodor - Record label - Great Britain

Hellas Planitia - A filamentary mark on Mars

Helmerich and Payne - NYSE symbol

Helmerich & Payne, Inc. - NYSE symbol (SPSG)

Hemel Hempstead - Postcode (ODBW)

Hemiparkinsonism - Medicine (EDAA)

Hemoperfusion - Medicine (EDAA)

Hemophilus Pleuropneumoniae - Medicine (EDAA)

Henderson & Pollard Ltd. - New Zealand

Heparin - Medicine (EDAA)

Heppenheim - Bergstrasse - German license plate city code

Heptode - Electronics (IAA)

Hesperian Foundation (EA)

Heterophase Polymerization (SAUS)

Hewlett-Packard Co.

Hexamethylmelamine and Cisplatin - Cisplatinum - Antineoplastic drug (DAVI)

Hide Position - Military technology (DDF)

Hiding Power - Paint technology

Higher Power (SAUS)

Highest Possible (ROG)

Highly Purified

High Pass - Electronics

High Performance

High Polymer (SAUS)

High Positive (SAUS)

High-Positive (MDG)

High-Potency - Pharmacy

High Potential (SAUS)

High Power

High Pressure

High-Pressure Cylinder - Especially, a locomotive cylinder

High Priest

High Priority

High Productivity

High Protein - Nutrition

High Purity (AAEL)

Highway Patrol (GOBB)

Himachal Pradesh - Indian Railway (TIR)

Hippocampal Pyramidal Cell - Neuroanatomy

Hip Prosthesis (MELL)

Hire Purchase

Historical Period - Dialog - Searchable field - Information service or system (NITA)

Historic Park (SAUS)

Hit by Pitcher - Baseball

Hit Points (SAUS)

Holding Pattern - Aviation

Holding Pipette

Holding Potential - Neurophysiology

Holiday Pay - Army (AABC)

Holiday Project (EA)

Hollow Point - Gunnery

Hollow Point Bullet

Homeland Party - Afghanistan - Political party (BUAC)

Homeopathic Pharmacopoeia

Home Page (SAUS)

Hope - Telegraphy (PCTE)

Horizontally Pivoted (SAUS)

Horizontal Parallax - Navigation

Horizontal Plane (MELL)

Horizontal Polarization

Horse Power (SAUS)

Hospital (SAUS)

Hospital Participation - Blood program - Red Cross

Hospital Pharmacist - Medicine (EDAA)

Host Processor

Hot Pack - or Pad - Physical therapy

Hot Pad (SAUS)

Hot Pilot - An egotistic flying cadet - Slang - Air Force

Hot Plate (SAUS)

Hot-Pressed - Paper

Hot Pressing (SAUS)

House Painter (ROG)

House Physician

Houses of Parliament - British

Howard Pardue - Air show performer (ASPC)

Hughes Policy (ACAE)

Hughes Procedure (ACAE)

Hughes Process (ACAE)

Humanist Party - Australia - Political party

Human Pituitary - Endocrinology (MAE)

Human Plasma - Hematology

Human Potential (DHP)

Humeral Plate - Entomology

Humeroscapular Periarthritis - Medicine (MELL)

Hundred Pounds

Hunger Project (EA)

Hurricane Program (SAUO)

Hybrid Perpetual (SAUS)

Hydranth Pulse (SAUS)

Hydraulic Platform (WDAA)

Hydraulic Power (SAUS)

Hydrazine Perchlorate (SAUS)

Hydrocollator Pack - Physical therapy (DAVI)

Hydrogen Peroxide (MELL)

Hydrogen Purge (MCD)

Hydrogen Purifier (SAUS)

Hydrophilic Petrolatum - Pharmacology (DAVI)

Hydrostatic Pressure

Hydroxyproline - An amino acid

Hydroxypyruvate - Medicine (EDAA)

Hyertension + Proteinuria (SAUS)

Hygroscopicity Potential (PDAA)

Hyperbolic Paraboloid (SAUS)

Hyperparathyroidism - or Hyperthyroidism - Endocrinology

Hyperperistalsis - Medicine (MELL)

Hyperphoria

Hyperplasia - Medicine (MELL)

Hyperpolarization

Hypersensitivity Pneumonitis - Medicine

Hypertension and Proteinuria - Medicine

Hypertransfused Polycythemic - Medicine

Hypnotic Progression

Hypophoria - Medicine (EDAA)

Hypophsrynx - Qtorhinolaryngology (DAVI)

Hysterical Personality

Members of HM armed forces on half-pay (SAUO)

Panama - Civil aircraft markings - international (PIPO)

Perigee Altitude (NASA)

Smith & Nephew Pharmaceuticals Ltd. - Great Britain - Research code symbol

Haltepunkt - Critical point (GIS)

Haptoglobin - Hematology

Harp - Music

Hematoporphyrin (STED)

Hemiplegia - Medicine

Heptyl - Biochemistry

Harp (GROV)

Heaping (STED)

Hectopig (SAUS)

hollowpoint (SAUS)

Horizontally Polarized (SAUS)

Horsepower (IDOE)

Hot Pack - Medicine (BCRP)

hyperbolic (SAUS)