Common meanings:
* Heads of households: This is a common abbreviation used in surveys and demographic research.
* Hands on inspection: This abbreviation is often used in technical or industrial contexts, referring to a thorough examination of an object or system.
* Home of origin: This is often used in genealogy and family history, referring to the place where a person's ancestors were born.
* Hearts of Iron: This refers to the popular strategy video game Hearts of Iron, which focuses on World War II.
Less common meanings:
* Help Our Island: This was a slogan used in the UK during World War II.
* Highly offensive item: This is a slang term sometimes used online.
To understand the meaning of "HOI" in a specific context, you'll need to consider the surrounding information.
Please provide more context so I can help you understand what "HOI" means in your particular case.