Context On the data team at Stack Overflow, we spend a lot of time and energy thinking about tech ecosystems and how technologies are related to each other. One way to get at this idea of relationships between technologies is **tag correlations**, how often technology tags at Stack Overflow appear together relative to how often they appear separately. One place we see developers using tags at Stack Overflow is on their [Developer Stories](https://stackoverflow.com/users/story/join), or professional profiles/CVs/resumes. If we are interested in how technologies are connected and how they are used together, developers' own descriptions of their work and careers is a great place to get that. Content A network of technology tags from [Developer Stories](https://stackoverflow.com/users/story/join) on the Stack Overflow online developer community website. This is organized as two tables: **stack_network_links** contains links of the network, the source and target tech tags plus the value of the the link between each pair **stack_network_nodes** contains nodes of the network, the name of each node, which group that node belongs to (calculated via a cluster walktrap), and a node size based on how often that technology tag is used Acknowledgements All Stack Overflow user contributions are licensed under [CC-BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/) with [attribution required](http://blog.stackoverflow.com/2009/06/attribution-required/).