In 1968, Control Data Corporation (CDC) announced the CDC 7600 supercomputer, considered by many to be the first true supercomputer.
The CDC 7600 was capable of 15 million computations per second and placed CDC as the leader in the supercomputer industry.
Learn more at http://www.computerhistory.org/VirtualVisibleStorage/artifact_main.php?tax_id=03.04.01.00#5.