This document provides an overview of database fundamentals including definitions of key terms like database, database management system (DBMS), and relation. It explains that a database is a collection of related data, while a DBMS is a collection of programs that allows users to create and maintain a database. The document also describes the components and functions of a DBMS. It introduces the relational database model and defines relations as subsets of Cartesian products consisting of ordered tuples. Finally, it discusses how relations can be represented in tabular form and used as databases.