IBM 30XX mainframe lines

The IBM 30XX mainframe lines are a group of lines of high-end System/370-compatible mainframes.

IBM 303X series - released in 1977.
IBM 308X series - released in 1980.
IBM 3090 series - released in 1985.
- IBM ES/3090 series - released in 1988.

See also

IBM 4300 and IBM 9370 - low-end S/370 compatible mainframe lines
Midrange computer

IBM mainframes
Preceded by IBM S/370	IBM 30XX mainframe lines	Succeeded by IBM S/390

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