* An acronym: It could stand for a company, organization, or initiative.
* A technical term: It might be used in a specific field like science, engineering, or business.
* A made-up word: It might be a fictional name used in literature, art, or games.
To figure out the meaning, you'll need more context.
Please provide more information about where you encountered the word "NAMARCO" so I can help you understand its meaning.