Where an acronym is used for an organisation then this will appear in the Organisations section.

  GWP : Global Warming Potential.

  HAV : Hand-Arm Vibration. This arises from the use of hand-held power tools and can result in ill health.

  HAVS : Hand Arm Vibration Syndrome.

  hp : Horsepower.

  HPS : High Pressure Sodium light.

  HST : HydroStatic Transmission.

  HWIN : Hot Water Insoluble Nitrogen.

  HWSN : Hot Water Soluble Nitrogen.

  IAG : Information Advice and Guidance.

  IBDU : Isobutylidene Diurea.

  ICBN : Acronym for the International Code of Botanical Nomenclature, now called the ICN (since 2011). Maintained by the International Association for Plant Taxonomy (IAPT). Link to web site

  ICE : Internal Combustion Engine.

  ICM : Integrated Crop Management.

  ICN : International Code of Nomenclature for algae, fungi, and plants, formerly known as the ICBN (changed in 2011). Maintained by the International Association for Plant Taxonomy (IAPT). Link to web site

  ICT : Information Communication Technology.

  IDM : Integrated Disease Management.

  IPM [1] : Integrated Pest Management (the most commonly used acronym).

  IPM [2] : Integrated Plant Management.

  IPM [3] : Integrated Pesticide Management (also known as the ‘Other IPM’).

  IQA : Internal Quality Assurance.