World Health Organisation
An acronym is a way of shortening a phrase so it is quicker to say or write, For Example: AKA is an acronym of 'Also Known As' and 'SCUBA' is an acronym of 'Self-Contained Underwater Breathing...
they are abbreviations for short phrases, like LOL, OMG, LMAO, BRB, and so on.
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'NICHCY' stands for 'National Dissemination Center for Children with Disabilities.'