Relational Databases: Relational databases organize data into tables consisting of rows and columns, with each row representing a record and each column representing an attribute. They use structured query language (SQL) for querying and manipulating data. Examples include MySQL, PostgreSQL, Oracle, SQL Server, and SQLite. Information systems are critical assets for organizations in today's digital age, enabling them to leverage data and technology to achieve their strategic objectives, gain competitive advantage, and drive innovation and growth.