Olulisteks

I couldn’t locate a widely recognized concept or term named “olulisteks” in reliable sources. Could you specify what you intend? Is it an Estonian linguistic term, a proper noun (such as an organization, project, or fictional group), or a concept from a particular field? Once you confirm the context, I can draft a concise, neutral wiki-style article (under 300 words). If you’re aiming for a fictional or worldbuilding concept, I can also provide a clearly labeled stub article describing its imagined origins, usage, and significance.