For example, are you asking about:
* ABC (American Broadcasting Company): A major American television network.
* ABC (Activity-Based Costing): A method of cost accounting that assigns costs to activities.
* ABC (Automated Billing and Collection): A system that automates the billing and collection process.
* ABC (Automated Banking Channel): Refers to automated teller machines (ATMs) and other self-service banking channels.
* ABC (Australian Broadcasting Corporation): The national public broadcaster of Australia.
* ABC (Anything But Casual): A dress code that allows for a variety of attire, but not casual clothing.
Once I know the context, I can provide you with a full description.