An acronym is a kind of abbreviation. It is a word formed by taking letters from a phrase that is too long to use comfortably.

eg: Laser is an acronym of Light Amplification by Stimulated Emission of Radiation

If the letters do not make a word, but are pronounced individually, as in the CIA or the BBC, it can be called an initialism.

Acronyms and Initialisms`
AcronymDefinition
A&CCGAshurst and Colbury Community Group
AGMAnnual General Meeting
APMAnnual Parish Meeting
CAHCommunity Action Hampshire
CPRECampaign to Protect Rural England
HALCHampshire Association of Local Councils
HAPTCHampshire Association of Parish and Town Councils
HCCHampshire County Council
HWRCHousehold Waste Recycling Centres
NFDCNew Forest District Council
NFNPANew Forest National Park Association
RAISERegional Action and Involvement South East
SEERASouth East England Regional Assembly