DB2

DB2, an IBM family of products, is a relational database management system (RDBMS) for large business computers that, according to IBM, leads in terms of database market share and performance. Although DB2 products are offered for UNIX-based systems and personal computer operating systems, DB2 trails Oracle's database products in UNIX-based systems and Microsoft's Access in Windows systems.

In addition to its offerings for the mainframe OS/390 and VM operating systems and its mid-range AS/400 systems, IBM offers DB2 products for a cross-platform spectrum that includes UNIX-based Linux, HP-UX, Sun Solaris, and SCO UnixWare; and for its personal computer OS/2 operating system as well as for Microsoft's Windows NT and Windows 95/98. DB2 databases can be accessed from any application program by using Microsoft's Open Database Connectivity (ODBC)  interface, the Java Database Connectivity (JDBC) interface, or a CORBA interface broker.