Learn the purpose and benefits of entity-relationship diagrams (ERDs), how to create and read them, and some common examples and applications.

Learn how to use entity-relationship models, cardinality, modality, and different notations and diagrams to identify and represent relationships between entities in data models.

Whether you’re planning a cloud network or a server rack setup, easily create network diagrams to illustrate physical systems or logical information flows.

Create, edit, and collaborate on diagrams with Visio in Microsoft 365. Use the online flowchart maker and diagram creator anytime, anywhere.

GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects.

BRMW is a free open source entity-relationship database modeling tool. We're working to make learning database modeling simple and accessible for everyone ...