A commercial RDBMS from IBM, also used on mainframes.
Short for Database 2. A commercial RDBMS developed by IBM, used across a broad range of environments from mainframes to Linux/Unix/Windows. Its mainframe edition in particular (DB2 for z/OS) has run for decades inside mission-critical systems demanding extreme reliability, like a bank's core account-processing systems, and remains in active production use today, especially in finance.
© 2026 ITBGM