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Learning & discovery

A world of knowledge to explore.

Follow an idea from a conversation to a book, a research question, or a practical skill. The World Library is the starting point.

Knowledge Index

A developing framework for understanding how knowledge is collected, preserved, shared, and used.

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What the Knowledge Index measures

We are developing a clear way to understand whether knowledge is accessible, useful, properly attributed, and preserved for the future.

Learning & resources

Books, research, education and practical learning.

Trust & preservation

Reliable sources, permissions and access to materials.

Community & opportunity

Shared knowledge, learning outcomes and documented knowledge services.

Verified measurements will be added when available. No estimates are presented as results.

Knowledge should be useful.

We focus on accessible learning, trustworthy sources, and respectful exchange. Where individual contributions are later published, attribution and permissions will matter.

For asset-related information and disclosures, visit the separate Investor Relations page.