TOKYO -- U.S.-built supercomputer Frontier defended its title as the world's fastest in a twice-yearly ranking by international experts published Monday.
Japan's Fugaku remains in second place as China, Europe boost development

The Frontier was named the world's fastest supercomputer in the Top500 list for the second time in a row.
TOKYO -- U.S.-built supercomputer Frontier defended its title as the world's fastest in a twice-yearly ranking by international experts published Monday.