# Legacy+ Legacy first encompasses the collection and waves of technologies used before the advent of digital information technology, with a long track record of evolution and utilization by society at scale. Most of the solutions discussed are document and paper-based with a few, such as credit cards, having some analog components. The "+" part of the designation in "Legacy+" includes the latest incremental wave of improvements to the existing legacy technologies through the use of digital technology, such as with chipped credit cards and enhanced smart passports. Given the wide adoption and stable usage of these technologies in everyday activities, we have a lot to learn about how these technologies have adapted to the needs of humans and have become increasingly useful. These learning can then be applied to the next generation of technologies being adopted including the Web 3.0 wave. ## 🌳 Contents * [**💪 Use cases**](/web3/uses.md) - Describe the way users and customers receive value through usage. * [**🤕 Harm cases**](/legacy/harms.md) - Attack vectors or vulnerabilities, describing the set of scenarios that lead to significantly undesirable outcomes. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://map.universal.id/legacy.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.