The following are pointers to other sites on the Internet involved in Database systems-related research or activities. Note that some of these links may be outdated. These links have been provided here for information purposes only. It does not indicate any endorsement of the linked site by the instructor, or by CSU or any of its departments or affiliates:

• Web page for good textbook materials
• LEAP — An Implementation of the Relational Algebra
• WDB – WWW/Database Interface
• PostgreSQL – a completely free and open source database system
• DBWORLD- The mailing list for the database community
• The Database Language SQL
• Standard for SQL Environments
• The Data Warehousing Institute
• draw.io Free OnLine and Desktop diagramming tool