Can you name popular relational database management systems?

Popular relational database management systems (RDBMS):

• MySQL — one of the most popular open-source RDBMS, often used in web development.
• PostgreSQL — a powerful open-source RDBMS with support for advanced features and SQL standards.
• Oracle Database — a commercial RDBMS with extensive functionality for enterprise solutions.
• Microsoft SQL Server — a commercial RDBMS from Microsoft, popular in Windows environments.
• SQLite — a lightweight embedded RDBMS, often used in mobile applications and for local storage.

Each of these systems has its own features, advantages, and areas of application.