Oracle Database
SQL Database system
History
The first product Oracle RDBMS Version 2 was introduced in 1979 for PDP-11 under RSX-11. Oracle Version 3 from 1983 was a complete rewrite in C programming language. The company name changed from RSI to Oracle Corporation.
Oracle Version 4 (1984) was also ported to the IBM PC. Oracle Version 5 (1985) was the first DOS product that breaks through the 640K barrier by using extended memory.
Oracle Version 6 (1988) introduced many new features and was available for OS/2.
Oracle7 (1992) was fully compliant with the SQL89 ANSI/ISO SQL standard.