This document provides an overview of different types of databases and data management systems. It discusses relational databases, CRM systems, open source software, and cloud-based systems. The key points are: - Relational databases allow data to be organized across multiple tables with relationships, making the data very scalable. - CRM systems track all interactions with constituents in one place to gain a full picture of engagement and facilitate relationship management. - Open source software provides free access to source code but maintenance and support are not free. Commercial support options are available from vendors. - Cloud-based systems offer remote access and automatic backups but require consideration of data security, costs, and cultural impacts on staff. Choosing