What is the purpose of the isoo cui registry?

There's no widely known or established registry officially called "ISOO CUI Registry." It's possible:

• There's a typo or misspelling: The name might be slightly different. Could you double-check the spelling? Perhaps it's related to a specific organization or project. Knowing the context (e.g., where you encountered this term) would be helpful.
• It's a very niche or internal registry: The registry may be specific to a particular company, research group, or internal system. It wouldn't be publicly known.
• It's a newly created or informal registry: The registry might be so new that it hasn't gained widespread recognition.

If you can provide more context or clarify the name, I can try to provide more specific information. For example, if the registry relates to a specific type of data (like clinical data, chemical identifiers, etc.), providing that information will help narrow down the possibilities.